Fix Windows Update Error 0x80070002: Missing Files
If you see error 0x80070002 when checking for updates, Windows is likely missing a file it needs....
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Outlook 'Cannot Expand Folder' Error
You open Outlook, click a folder, and see: "Cannot expand the folder. The set of folders cann...
Fix BitLocker 404 Error When Unlocking a Drive
If you see a '404 not found' error when trying to unlock a BitLocker-encrypted drive, it usually ...
Fix Windows Activation Version Mismatch via Command Prompt
If you see an error like "The version of Windows you are trying to activate does not match the pr...
Fix Windows Security Path Not Found After Update
After a Windows update, some users see a 'path not found' error when opening Windows Security. Th...
Fix Windows Activation 502 Bad Gateway Firewall Issues
When you try to activate Windows and see a 502 Bad Gateway error, it often point...
Topic paths
Quick titles
Fix Proxy Configuration Blocking Windows DefenderFix Windows Search Not Working Due to DNS ErrorTeams Internet Connectivity Check Failure GuideFix Windows Update Manual Install FailureHow to Change Windows Update PortTroubleshoot Windows Defender Sync on macOSHow to Fix Connection Refused in ChromeWindows Security App Crashing Troubleshooting