Fix Clipboard History Sync Failing Between Two PCs on Windows 11

You copy text on your desktop PC and expect to paste it on your laptop, but the clipboard history shows nothing from the other device. This synchronization failure often happens after a Windows update, a sign-out, or when one PC is on a different Microsoft account. The root cause is almost always a misconfigured sync setting, a corrupted clipboard cache, or an inactive cloud clipboard service. This article explains why sync breaks and provides exact steps to restore clipboard history sharing between your Windows 11 PCs.

Why Clipboard History Sync Stops Working on Windows 11

Clipboard history sync relies on the Microsoft cloud service that is tied to your Microsoft account. When you copy an item on PC A, Windows uploads that item to the cloud and then downloads it to PC B. This process requires three conditions to be met simultaneously. First, the Clipboard history feature must be enabled on both PCs. Second, the “Sync across devices” toggle must be turned on and set to automatic sync. Third, both PCs must be signed into the same Microsoft account and connected to the internet.

If any one of these conditions is broken, the sync fails silently. The most common break is the sync toggle being turned off after a Windows update. Another frequent cause is a corrupted clipboard cache that prevents new items from being uploaded. Less common but equally disruptive is a mismatch in Microsoft accounts — one PC may be signed into a work account while the other uses a personal account. The sync service itself can also stop running if the Clipboard User Service is disabled in Services.msc.

How the Clipboard Sync Service Works

When you press Windows key + V to open clipboard history, Windows displays items stored locally on that PC. The sync service runs in the background and periodically checks for new items. If sync is enabled, each copied item is encrypted and sent to Microsoft’s cloud endpoint. The receiving PC pulls the item down and adds it to its local clipboard history. This process typically takes less than 10 seconds on a stable internet connection.

Steps to Fix Clipboard History Sync Between Two Windows 11 PCs

Perform these steps on both PCs unless otherwise noted. Run them in the order listed to avoid missing a dependency.

1. Verify the Microsoft account on both PCs
   Open Settings > Accounts > Your info. Confirm the email address shown under your account name is identical on both PCs. If one PC shows a work or school account, click “Sign in with a Microsoft account instead” and enter the same account used on the other PC. After signing in, restart both PCs.
2. Enable Clipboard history on both PCs
   Go to Settings > System > Clipboard. Turn on the toggle for “Clipboard history.” Without this feature enabled, the sync service has no items to upload or download.
3. Turn on Sync across devices
   On the same Clipboard settings page, locate “Sync across devices.” Set it to “Automatically sync text that I copy.” Do not choose “Manually sync text that I copy” because that option requires you to open clipboard history and manually push items, which is not a true sync.
4. Clear clipboard history on both PCs
   Press Windows key + V to open clipboard history. Click the three-dot menu (ellipsis) next to any item and select “Clear all.” This removes all locally stored clipboard data, including any corrupted entries that may block uploads. After clearing, copy a new piece of text on PC A, wait 15 seconds, then press Windows key + V on PC B. The item should appear.
5. Restart the Clipboard User Service
   Press Windows key + R, type services.msc, and press Enter. Scroll down to “Clipboard User Service.” Right-click it and select Restart. If the service is not running, right-click and select Start. Set its startup type to Automatic by double-clicking the service, changing “Startup type” to Automatic, and clicking Apply. Repeat on the other PC.
6. Check internet connectivity and proxy settings
   Sync requires an active internet connection. Open Settings > Network & internet > Status. If you are behind a corporate proxy or VPN, the sync may be blocked. Temporarily disable the VPN or add clipboard.cloud.microsoft.com and all subdomains to the proxy allowlist. After changing proxy settings, restart both PCs and test sync again.
7. Reset the clipboard cache via PowerShell
   On each PC, right-click the Start button and select Windows Terminal (Admin). Run the following command: Get-AppxPackage windows.clipboard | Reset-AppxPackage. This command resets the clipboard app package to its default state, clearing all cached data and re-registering the sync service. Wait for the command to complete, then restart the PC. After reboot, re-enable Clipboard history and sync as described in steps 2 and 3.

If Clipboard Sync Still Fails After the Main Fix

Clipboard history shows “Couldn’t sync” error

This error appears when the cloud sync server cannot be reached. Open Settings > System > Clipboard and look for a “Sync” status line. If it says “Couldn’t sync,” click the “Sync now” button. If the error persists, open a Command Prompt as administrator and run ipconfig /flushdns to clear your DNS cache. Then test sync again. If the error remains, the Microsoft account may have a sync limit — you can only sync text items, not images or files. Copy a simple text string like “test123” and check if that syncs.

Clipboard history works on one PC but not the other

If PC A can see its own clipboard items but PC B never receives them, the issue is almost always a mismatched sync setting or a firewall rule on PC B. On PC B, open Windows Security > Firewall & network protection. Click “Allow an app through firewall.” Scroll to “Clipboard User Service.” Ensure both Private and Public checkboxes are checked. If the service is not listed, click “Change settings,” then “Allow another app,” browse to C:\Windows\System32\ClipboardUserService.exe, and add it. Restart both PCs.

Sync stops after a Windows 11 feature update

Feature updates sometimes reset sync settings to defaults. After a major update, you must manually re-enable Clipboard history and sync on each PC. Go to Settings > System > Clipboard and confirm both toggles are on. Additionally, update your Microsoft account credentials by going to Settings > Accounts > Your info and clicking “Verify” if a banner appears. If sync still does not work after re-enabling, run the PowerShell reset command from step 7 above.

Clipboard History Sync vs Windows 11 Clipboard History: Feature Comparison

Item	Clipboard History Sync	Local Clipboard History
What it does	Shares clipboard items between multiple PCs signed into the same Microsoft account	Stores up to 25 copied items on a single PC for later pasting
Requires internet	Yes – uploads and downloads via Microsoft cloud	No – all data stays on the local device
Supported content	Plain text and HTML text only – no images or files	Text, HTML, and images up to 4 MB per item
Privacy	Items are encrypted in transit and stored in Microsoft cloud for up to 24 hours	Items are stored locally and never leave the PC
Turned on by default	No – must be manually enabled on each PC	No – must be enabled via Settings or Windows key + V prompt

If you do not need cross-device sync, you can leave local clipboard history enabled for quick pasting of recent items. Sync is only useful when you regularly work on two or more Windows 11 PCs with the same Microsoft account.

After completing the steps above, you should see clipboard items from PC A appear on PC B within 10 to 15 seconds. To test, copy a short text snippet on one PC, switch to the other, and press Windows key + V. If the item appears, sync is working. As an advanced tip, you can pin frequently used items in clipboard history by clicking the pin icon next to each item — pinned items are not cleared when you use the “Clear all” button. This keeps your essential snippets available across both devices without having to recopy them.