
Fix Windows Defender Sync Error Across Devices
You see a sync error in Windows Security that says something like “Something went wrong. Try to s...

You see a sync error in Windows Security that says something like “Something went wrong. Try to s...

After a Windows update, you might find the Windows Security app missing from the Start menu or sy...

You try to unlock a BitLocker drive, and Windows returns "Authentication failed. Permissi...

You open OneDrive and see an error like “Your token has expired” or code 0x8004de40. This usually...

You try to move, delete, or rename a file, and Windows shows error 0x80070020: "The file is locke...

If you notice that Windows Security (formerly Windows Defender) is using a lot of memory—sometime...