Telegram Desktop Not Opening or Crashing on Windows: Fixes

When Telegram Desktop will not open or keeps crashing on Windows, the cause is usually one of a handful of things: a copy already running in the background, a broken update, a graphics setting that clashes with your video driver, damaged local data, or security software blocking the app. Work out which symptom you have, then apply the matching fix below. Your cloud chats are stored on Telegram's servers, so none of these fixes can delete your messages.

First, what kind of failure is it?

"Not opening" covers several different problems. Naming yours correctly saves a lot of time, because each one points to a different cause.

• Nothing happens at all when you click the icon. Often a copy is already running, hidden in the system tray, or a stuck process is blocking a new one.
• Telegram shows in the taskbar or tray, but no window appears. It is running and hidden, either minimised to the tray or placed off-screen. This is the easiest case to fix.
• A window flashes up, then disappears. Typical of damaged local data, a broken update or a graphics problem at start-up.
• The app opens, then crashes when you do something specific. Opening a photo, starting a call, opening one particular chat or opening settings. That points to the part of the app involved, often graphics or camera drivers.
• The app opens but freezes or stays white or black. Usually graphics rendering, sometimes a very large local cache.
• The app opens but says "Connecting" or "Updating" forever. That is a network problem, not a crash. Use Telegram stuck on connecting instead.
• Windows shows an error message naming a missing file or blocked app. Read the exact message. It usually names security software or a damaged installation.

Before you start: what is safe and what is local

It helps to know what lives where before you change anything.

Your normal chats, groups, channels and media are cloud chats. They are stored by Telegram and appear again on any device you log in to. Reinstalling or resetting Telegram Desktop cannot delete them.

Telegram Desktop also keeps local data on your PC. For the standard installer this is typically in a folder called Telegram Desktop inside your user's AppData\Roaming folder, and the important part is a sub-folder called tdata. It holds:

• Your login session, so you do not need to sign in each time.
• Your local settings, such as theme, notification choices and the download folder.
• A local passcode, if you set one.
• Cached media and temporary files.

Files you deliberately downloaded are usually in a separate folder, often a "Telegram Desktop" folder inside your Downloads. Those are not inside tdata.

Secret chats are not available in Telegram Desktop for Windows at all, so there are none on your PC to lose. They exist only on the phones or tablets where they were started.

One safety rule for everything below: when a fix involves the tdata folder, rename it rather than delete it. Renaming is reversible. If the fix does not help, you can rename it back and you are exactly where you started.

Have a way to log back in

Some fixes log you out of Telegram Desktop. To log in again you will need either your phone with Telegram on it (to scan a QR code or receive the code in the app) or access to your number. If you use two-step verification, know your password. See how to log in to Telegram with a QR code.

Quick fixes to try first

These take two minutes and solve a surprising share of cases.

1. Check the system tray. Click the small arrow near the clock on the taskbar. If you see the Telegram icon, Telegram is already running. Click the icon to show the window.
2. Restart the PC. This clears stuck processes, unfinished updates and locked files in one go.
3. Try Telegram Web in your browser. If the web version works, your account and connection are fine and the problem is the Desktop app on this PC. Our guide on using Telegram on desktop and web explains the options.
4. Note what changed. A Windows update, a new graphics driver, new antivirus software or a Telegram update just before the problem started is a strong clue.

If none of those help, go through the causes below in order. They are sorted from most likely and least disruptive to least likely and most disruptive.

Cause 1: a stuck Telegram process

Telegram Desktop is designed to run once. When you click the icon while a copy is running, the new copy just tries to bring the old window forward. If the old copy is frozen or invisible, nothing seems to happen.

How to recognise it

• Clicking the icon does nothing, or the cursor spins briefly and stops.
• Task Manager shows Telegram running even though you see no window.
• The problem disappears after a restart, then returns.

How to fix it

1. Press Ctrl, Shift and Esc together to open Task Manager.
2. Look for Telegram in the list of processes. Click More details if the list is short.
3. Select every Telegram entry and choose End task.
4. Wait a few seconds, then start Telegram again from the Start menu.

If it keeps happening

A process that freezes repeatedly is a symptom, not the cause. Check Cause 4 (graphics) and Cause 5 (damaged local data). Also check that you have only one version of Telegram installed, as explained in Cause 7.

Cause 2: the window is open but hidden

Sometimes Telegram has opened perfectly well and you simply cannot see it. Two settings and one hardware change cause this.

Telegram starts minimised on purpose

Telegram Desktop can launch automatically when Windows starts, and it has an option to launch minimised. With both on, it starts straight into the system tray. Clicking the Start menu shortcut then does little, because Telegram is already running.

1. Click the Telegram icon in the system tray to open the window.
2. Open Settings, then Advanced, and look at the start-up options.
3. Turn off launching minimised if you prefer to see the window, or keep it and remember to open Telegram from the tray.

The window opens off-screen

If you used Telegram on a second monitor and then unplugged it, Windows may still place the window where that monitor used to be. Telegram is open, it shows in the taskbar, and you see nothing.

1. Click Telegram in the taskbar so it is the active window.
2. Press the Windows key, Shift and the left or right arrow key together. This moves the active window to the next display, which brings it back onto your screen.
3. If that does not work, hover over Telegram in the taskbar, right-click the preview and choose Maximize.

If neither applies

If Telegram is not in the tray and not in the taskbar, it is genuinely not running or not starting. Continue with the next cause.

Cause 3: a failed or half-finished update

Telegram Desktop updates itself in the background. If the download is interrupted, or the PC shuts down while files are being replaced, the next start can fail.

How to recognise it

• The problem started right after Telegram said it was updating, or after a restart that followed one.
• The window flashes briefly and closes.
• Windows may report that a file is missing or damaged.

How to fix it

1. End all Telegram processes as in Cause 1.
2. Download the latest Telegram Desktop installer from Telegram's official website. Avoid download sites that repackage it.
3. Run the installer. Installing over the top of the current version keeps your tdata folder, so you stay logged in.
4. Start Telegram.

If that does not work

Uninstall Telegram from Windows Settings, restart the PC, then install fresh from the official site. Uninstalling normally leaves tdata in place, so you may still be logged in afterwards. If the problem continues even with a clean install, the cause is probably your local data or your graphics setup, not the program files.

Cause 4: graphics and video driver problems

Telegram Desktop draws its interface, photos, videos and calls using your graphics card. On Windows it can use different rendering methods, and some combinations of method, graphics card and driver do not work well. Problems here are common on PCs with older drivers, two graphics chips (typical of laptops) or remote desktop setups.

How to recognise it

• The window is black, white or garbled.
• Telegram crashes when you open a photo or video, start a video call, or play a GIF.
• The problem started after a graphics driver update, or after a Telegram update.
• It happens on one PC but not on another with the same account.

How to fix it: update the graphics driver

1. Find out which graphics chip you have. Device Manager lists it under Display adapters.
2. Get the current driver from the maker of your graphics chip or your PC maker. Windows Update can also offer drivers, but they are sometimes older.
3. Install the driver and restart.
4. Start Telegram and repeat what made it crash.

How to fix it: change Telegram's graphics settings

If Telegram stays open long enough to reach its settings, you can change how it renders.

1. Open Settings, then Advanced.
2. Look for the performance or graphics options. Depending on your version these include a hardware acceleration switch and, on Windows, a choice of graphics backend (often labelled ANGLE).
3. Change one option at a time. For example, try a different backend, or turn hardware acceleration off.
4. Restart Telegram when asked, then test again.

Option names and positions change between versions, so if you cannot find them, look through the Advanced section rather than relying on an exact path. Turning hardware acceleration off can make animations less smooth, but a stable app is worth that.

For laptops with two graphics chips

Windows lets you choose which chip an app uses. In Windows display settings, the Graphics page lets you add Telegram and set it to power saving or high performance. If Telegram crashes on one setting, try the other.

If nothing changes

If Telegram crashes before you can reach its settings and a driver update does not help, move on to Cause 5. A damaged settings file can also hold a bad graphics choice, and resetting local data clears it.

Cause 5: damaged local data (the tdata folder)

Local data can be damaged by a crash during writing, a full disk, an interrupted sync tool or a faulty storage drive. Telegram then fails while reading it at start-up.

How to recognise it

• Telegram flashes and closes even after reinstalling.
• Logging out on another device and trying again makes no difference.
• The problem appeared after the PC lost power or the disk ran out of space.

How to fix it: clear the cache first, if you can

If the app opens at all, start with the gentler option.

1. Open Settings, then Advanced.
2. Find the local storage section, often called Manage local storage.
3. Clear the cache. This removes cached media only. Your chats stay in the cloud and reload as you open them.

See how to clear the Telegram cache for what clearing does on each platform.

How to fix it: reset local data by renaming tdata

If the app does not open at all, reset the local data.

1. End all Telegram processes in Task Manager.
2. Press Windows key and R together, type %appdata% and press Enter. File Explorer opens your AppData\Roaming folder.
3. Open the Telegram Desktop folder.
4. Rename the tdata folder to something like tdata-old. Do not delete it.
5. Start Telegram. It should open as if newly installed and ask you to log in.
6. Log in with the QR code from your phone or the code sent to your Telegram app.

Your chats, groups and channels load from the cloud. You will need to set your local preferences again, such as notifications, theme, download folder and any local passcode.

What you lose and how to get it back

Renaming tdata loses only local things: settings, cache and the session on this PC. If the reset fixed the problem, you can delete tdata-old after a few days. If it did not fix the problem, close Telegram, delete the new tdata folder that was just created, and rename tdata-old back to tdata. You are then back where you started and have learned that local data is not the cause.

Portable and non-standard installs

If you use the portable version, or installed Telegram somewhere unusual, the tdata folder sits next to the Telegram program file rather than in AppData. The same rename method applies there.

Cause 6: antivirus or Windows security blocking Telegram

Security software sometimes treats a freshly updated program as suspicious, blocks it from writing its own files, or quietly quarantines a part of it.

How to recognise it

• The problem started after a Telegram update or after installing new security software.
• Your antivirus history shows a blocked or quarantined Telegram file.
• Windows Security mentions Controlled folder access blocking Telegram.

How to fix it

1. Open your security software's history or quarantine and look for Telegram entries.
2. If a Telegram file was quarantined and you downloaded Telegram from the official website, restore it and allow it.
3. In Windows Security, open Virus and threat protection, then the ransomware protection area. If Controlled folder access is on, check its block history and allow Telegram if it is listed.
4. Restart Telegram.

A safety note

Only allow Telegram if you are sure your copy came from the official site. Fake "Telegram" installers that carry malware do circulate. If you are not sure where your copy came from, uninstall it and install a fresh copy from the official site before allowing anything. The same caution applies to modified versions; see third-party Telegram clients for why that matters.

Cause 7: two copies of Telegram fighting each other

Telegram Desktop for Windows comes in several forms: the standard installer from the website, a portable version, and a version from the Microsoft Store. Having more than one on the same PC can cause confusion over which one starts, which one updates, and which tdata folder is used.

How to recognise it

• You see two Telegram entries in the Start menu or in installed apps.
• Telegram sometimes opens with different settings, or asks you to log in again unexpectedly.
• One shortcut works and another does not.

How to fix it

1. Open Windows Settings, then Apps, and search for Telegram.
2. Decide which version you want to keep. The website installer is the most common choice and updates fastest.
3. Uninstall the others.
4. Delete leftover shortcuts that point to removed versions.
5. Restart and open the version you kept.

If you used the Store version and switch to the website version, you will probably need to log in again, because the two keep local data in different places.

Cause 8: your Windows version is no longer supported

Telegram supports current versions of Windows and drops very old ones from time to time. A new Telegram release may refuse to start, or crash, on an unsupported system.

How to recognise it

• You are on an old Windows version that no longer gets security updates.
• The problem started right after a Telegram update and nothing else helps.

How to fix it

1. Check the system requirements on Telegram's official download page.
2. If your Windows version is listed as unsupported, the real fix is updating Windows or using another device.
3. Meanwhile, use Telegram Web in a current browser, which usually still works on older systems.

Avoid hunting down an old Telegram installer from unofficial sites to get around this. Old builds miss security fixes, and unofficial downloads are a common way malware spreads.

Cause 9: damaged Windows system files or a full disk

Less common, but worth ruling out when several apps misbehave, not just Telegram.

How to recognise it

• Other programs also crash or refuse to start.
• Your system drive is almost full.
• Windows itself shows errors or slowdowns.

How to fix it

1. Free up space on the system drive. Telegram needs room to write its cache and update files. Windows Storage settings show what is using space.
2. Run the Windows System File Checker from an administrator command prompt. Microsoft's own help pages describe how to run it on your version of Windows.
3. Install pending Windows updates and restart.
4. Try Telegram again.

When Telegram crashes during one specific action

If Telegram opens fine but crashes at one moment, the action tells you where to look.

Crashes when opening photos or videos

This is almost always graphics. Follow Cause 4: update the driver, then try a different graphics backend or turn hardware acceleration off. Also try clearing the cache, in case one cached file is damaged.

Crashes when starting a call or video chat

Calls use your camera, microphone and audio devices. Update audio and camera drivers. Unplug extra headsets, webcams or virtual camera software, then test with just one device. In Windows privacy settings, check that apps are allowed to use the camera and microphone. Our guide on video calls and group video calls covers call settings.

Crashes when opening one particular chat

A single damaged cached item can do this. Clear the cache. If the crash continues, open that chat on your phone or Telegram Web, and check whether one message, sticker or file is unusual. You can also report it as a bug, as described below.

Crashes when opening settings or a menu

This points to a bug in that version or damaged local settings. Update Telegram first. If it continues, reset local data as in Cause 5.

Collecting details and reporting the bug

If you have tried everything and Telegram still crashes, report it. Developers can only fix crashes they can see.

1. Note your Windows version, Telegram version (shown in settings, or in the app's About information) and your graphics chip.
2. Write down exactly what you did before the crash.
3. Find the log file. Telegram Desktop writes a text file called log.txt in its data folder, the same Telegram Desktop folder that holds tdata.
4. Use Telegram's official bug reporting channels, which Telegram links from its website and support pages, to describe the problem.

Before attaching a log anywhere, open it and read it. Logs are mainly technical, but check that nothing in it is something you would not want to share. Never send anyone the tdata folder itself. It contains your login session, and anyone holding it could open your account.

Using Telegram while you fix it

You do not have to be cut off while you troubleshoot.

• Telegram Web works in any current browser and gives you your full cloud history.
• Your phone stays logged in independently of the PC.
• If Telegram Web gives you trouble too, see Telegram Web not working.

For the trade-offs between the apps, see Telegram Desktop vs Web vs Mobile.

Worked example: a laptop that crashes on photos

This is an illustration of how the causes combine.

Sam's laptop has two graphics chips. After a Windows update, Telegram Desktop opens normally but closes whenever he opens a photo.

1. He checks the obvious first. Restarting does not help, and Telegram Web shows photos fine. So the account is fine and the problem is local.
2. Because the crash happens on photos, he suspects graphics (Cause 4).
3. He updates the driver for his main graphics chip from the laptop maker's site. Still crashing.
4. He opens Telegram's Advanced settings and switches to a different graphics backend. After a restart, photos open.
5. Out of curiosity he switches back, and the crash returns. So he leaves the working option on and makes a note of it.

Total time: about fifteen minutes, and he never needed to reset tdata or log out.

Common mistakes

• Deleting tdata instead of renaming it. Deleting cannot be undone. Renaming gives you the same test with an easy way back.
• Reinstalling over and over. If one clean install does not help, the cause is not the program files. Move on to graphics, local data or security software.
• Downloading Telegram from unofficial sites. Repackaged installers can carry malware, and old builds miss security fixes.
• Running Telegram as administrator to "fix" it. This can create files your normal account cannot later read, which causes new problems. Run it normally.
• Sending the tdata folder to someone for help. It contains your login. Anyone with it can use your account.
• Assuming "Connecting..." is a crash. That is a network issue with its own fixes.
• Turning off antivirus permanently. If security software is the cause, allow the official Telegram app specifically, then turn protection back on.

FAQ

Will reinstalling Telegram Desktop delete my chats?

No. Cloud chats are stored by Telegram and reload when you log in again. Reinstalling, or even resetting local data, only affects settings, cache and the login on that PC. Files you downloaded to your Downloads folder are also left alone.

Why does Telegram open and immediately close?

The most common reasons are a damaged update, damaged local data in tdata, or a graphics problem at start-up. Reinstall from the official site first. If that fails, rename tdata and log in again. If that also fails, update your graphics driver.

Telegram is running in Task Manager but I see no window. What do I do?

Check the system tray first, because Telegram often minimises there. If it is not in the tray, end every Telegram process in Task Manager and start it again. If this keeps happening, look at graphics settings and local data.

Do I need to log in again after fixing it?

Only if you reset local data or switched to a different version of the app. Keep your phone nearby so you can scan the QR code or receive the login code in Telegram, and know your two-step verification password.

I forgot my local passcode on Telegram Desktop. Is that the same problem?

No, the app is working, but you are locked out of it on that PC. The local passcode only protects that device. From your phone, open the list of active sessions in privacy and security settings and end the Desktop session. Then reset local data on the PC by renaming tdata, and log in again. See our guide how to set a passcode lock on Telegram.

Is the Microsoft Store version or the website version better?

Both are official. The website version usually updates first and keeps data in a predictable place, which makes troubleshooting easier. What matters most is not mixing the two on one PC.

Telegram crashes on Windows but works on my phone. Is my account the problem?

Almost certainly not. If Telegram works on your phone or on Telegram Web, your account and connection are fine. The problem is with the Desktop app on that PC: its files, its local data, its graphics settings or software around it.

Summary

Identify your symptom first: nothing happens, a flash and close, a crash on one action, or a frozen window. Then work through the causes in order: end stuck processes, reinstall from the official site, fix graphics drivers and Telegram's graphics settings, reset local data by renaming tdata, check security software, remove duplicate installs and confirm your Windows version is supported. Your cloud chats are safe throughout, so the only things at stake are local settings and the login on that PC.