Clipboard won't open because of a corrupted cache, a conflicting app update, or permission settings that block the app from running
The Clipboard app on Windows or Mac sometimes fails to launch for straightforward reasons: the app's stored data has become corrupted, a recent system update changed how the app runs, or your user account doesn't have permission to access it. Unlike a crash that shows an error message, a non-opening app simply does nothing when you click it — no window appears, no error appears, nothing happens at all.
The fastest fix is usually to clear the app's cache and restart your computer. If that doesn't work, you may need to reinstall the app or check whether another program is blocking it. On Windows, Clipboard is built into the system and cannot be uninstalled the way a regular app can, so the steps differ from Mac.
Key Takeaways
- Restarting your computer clears temporary files that may be preventing Clipboard from opening, and should be your first step.
- On Windows, clearing the Clipboard cache through Settings or using the Disk Cleanup tool often fixes the problem without reinstalling anything.
- On Mac, deleting the Clipboard preference file in your Library folder and restarting usually restores normal operation.
- If Clipboard still won't open after these steps, a conflicting third-party app or antivirus software may be blocking it, and you should check your security settings.
Restart your computer first
Before trying anything else, shut down your computer completely and turn it back on. This clears temporary files, resets background processes, and often fixes apps that won't launch. Many Clipboard problems disappear after a restart because the app's cache files were corrupted or locked by another process.
On Windows, click the Start button, select Power, and choose Shut down. Wait 30 seconds, then turn the computer back on. On Mac, click the Apple menu, select Shut Down, and wait for the same interval before restarting. If Clipboard opens normally after the restart, the problem is solved.
Clear the Clipboard cache on Windows
If restarting didn't work, Windows stores Clipboard data in a cache folder that can become corrupted. You can clear this cache through the Disk Cleanup tool without affecting your files or settings.
Open the Start menu and type "Disk Cleanup" into the search box. Click the Disk Cleanup app when it appears. In the window that opens, scroll down and look for "Temporary files" or "Recycle Bin" — check the boxes next to these items. Click Delete Files at the bottom. Windows will remove the cached data, and Clipboard should open normally when you restart.
Alternatively, you can clear the cache manually. Press Windows Key + R to open the Run dialog, type %temp% and press Enter. A folder will open showing temporary files. Select all files in this folder (Ctrl + A), then delete them. Restart your computer afterward.
Clear the Clipboard preference file on Mac
Mac stores Clipboard settings in a hidden preference file that occasionally becomes corrupted. Deleting this file forces Mac to create a fresh copy the next time you use Clipboard.
Open Finder and press Command + Shift + G to open the "Go to Folder" dialog. Type ~/Library/Preferences and press Enter. Look for a file named com.apple.LaunchServices.QuarantineResolver.plist or any file starting with "com.apple.clipboard" — select it and move it to the Trash. Empty the Trash, then restart your Mac. Clipboard will rebuild its settings automatically.
Check whether antivirus or security software is blocking Clipboard
Third-party antivirus programs, firewalls, or security suites sometimes block system apps from running if they flag them as suspicious. This is rare but happens when a security tool is overly aggressive or outdated.
Open your antivirus or security software and look for a quarantine, blocked apps, or exclusions section. Search for Clipboard in the list of blocked or quarantined items. If you find it, restore it or add Clipboard to the exclusions list. Restart your computer and try opening Clipboard again. If you're unsure how to access these settings in your specific security software, check the program's help menu or support website.
Reinstall Clipboard on Mac
If clearing the preference file didn't work, you can reinstall Clipboard on Mac by restoring it from a backup or downloading it fresh from the Mac App Store. This is a last resort because Clipboard is a system app and should not need reinstalling under normal circumstances.
Open the Mac App Store and search for "Clipboard". If you see an option to download or install it, click that button. If the App Store shows "Open" instead, Clipboard is already installed and the problem lies elsewhere — try the preference file deletion step again or contact Apple Support. After reinstalling, restart your Mac.
Check your user account permissions on Windows
Rarely, a Windows user account with restricted permissions cannot run certain system apps. If you are using a limited or guest account, try logging into an administrator account and opening Clipboard from there. If it opens in the administrator account but not your regular account, your account permissions need adjustment.
Right-click the Clipboard app shortcut and select Properties. Click the Advanced button, then check the box next to "Run this program as an administrator". Click OK and try opening Clipboard again. If this works, Clipboard will now run with the permissions it needs.
Frequently Asked Questions
Why does Clipboard disappear after I restart my computer?
Clipboard content is temporary and clears when you shut down your computer — this is normal behavior. If you need to save something you copied, paste it into a document or note-taking app before restarting. The Clipboard app itself should still open after a restart; if it doesn't, follow the cache-clearing steps above.
Is Clipboard the same as the clipboard manager on my phone?
No. The Clipboard app on Windows or Mac is a system tool that stores what you copy and paste. A clipboard manager is a separate third-party app that keeps a history of everything you've copied. They serve different purposes, though some phones and computers now include clipboard history as a built-in feature.
Can I uninstall Clipboard on Windows?
No. Clipboard is a core Windows system component and cannot be uninstalled through Settings or the Control Panel. You can only clear its cache or repair it by following the steps above. If you want to remove Clipboard functionality entirely, you would need to modify Windows system files, which is not recommended.
What if Clipboard opens but doesn't show my copied items?
This usually means the cache is corrupted but the app itself is running. Follow the cache-clearing steps for your operating system. If clearing the cache doesn't restore your clipboard history, the items may have been lost when the cache corrupted — this is why clipboard managers exist, to preserve that history.
Does clearing the Clipboard cache delete my files?
No. Clearing the Clipboard cache only removes temporary data that the app uses to store what you've copied. Your actual files, documents, and photos remain untouched. The cache is separate from your file system.