Fix Windows Defender Module Not Found Error 0x80070643
You see "Windows Defender module not found" with error code 0x80070643
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Certificate Error 0x800b0109
When you see error code 0x800b0109 in Windows, it means the operating system cannot verify a digi...
Fix Microsoft Store Error 0x80070005 Permission Denied
When you see error 0x80070005 in the Microsoft Store, it usually means the Store doesn’t have the...
How to Fix Outlook Setup Error 'Cannot Start Microsoft Outlook'
You open Outlook and see: "Cannot start Microsoft Outlook. Cannot open the Outlook window."
How to Fix BitLocker High CPU Usage on Systems Without TPM
If you're running BitLocker on a system without a Trusted Platform Module (TPM), you may notice h...
Fix 'Windows Defender Firewall Has Blocked' Error
You see a notification that Windows Defender Firewall has blocked an app or feature. This usually...
Topic paths
Quick titles
Fix Windows Defender Sync Error Across DevicesRemote Desktop Reset Permission Denied TroubleshootingMicrosoft Store Error 502 After Windows Update – FixTroubleshoot Windows Search Index FailureRun Task Scheduler Only When Internet Is AvailableFix Nginx 404 Not Found After Changing Root DirectoryResolve Chrome Error Code 0x80070005 on WindowsFix Chrome Tunnel Connection Failed: Network Config Guide