Fixing Windows Security Proxy Configuration Issues
When Windows Security (formerly Windows Defender Security Center) can't update virus definitions ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listBitLocker Encryption Paused After Windows Update: Fixes
After a Windows update, you might see BitLocker encryption paused with a yellow warning icon. Thi...
Fix 'Port Already Allocated' Error in Windows Defender on Windows 10
You may see an error like "Windows Defender Firewall cannot use port X because it is already allo...
Fix Windows Update Path Not Found Error in Windows 10
When you try to run Windows Update in Windows 10 and see an error like "The path specified cannot...
How to Fix DNS Probe Finished NXDOMAIN on Chrome (IPv4/IPv6)
You're browsing in Chrome and suddenly see "DNS probe finished NXDOMAIN" — meaning the domain nam...
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...
Topic paths
Quick titles
Windows Defender Permission Denied: How to FixFix Windows Activation Sync Issue Between Windows and UbuntuFix Windows Security Real-Time Protection Not WorkingFix OneDrive High CPU on StartupFix Chrome ERR_TUNNEL_CONNECTION_FAILED on Windows 10Fix BitLocker Recovery Key Access Denied ErrorsWindows Security Invalid Configuration Error FixHow to Solve PowerShell Command Not Found in Windows 10