How to Fix Windows Defender Service Not Running
If you see a message that Windows Defender is not running or the security center shows it's off, ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Defender 504 Gateway Timeout & Permission Denied Errors
You open Windows Defender Security Center and see "504 Gateway Timeout" or "Permission Denied" er...
Fix Microsoft Teams Web Stuck on Loading Screen
You open Microsoft Teams in your browser, but it stays on the spinning loading circle or a blank ...
Fix Windows Activation Update Error 0x80070643
If you see error 0x80070643 during a Windows activation update, the update process has been inter...
Fix OneDrive Sync 504 Gateway Timeout Error
If you see a "504 Gateway Timeout" error when syncing OneDrive, it usually means the sync service...
Fix Remote Desktop Black Screen After Login
You log into a remote computer via Remote Desktop (RDP), see the login screen, enter credentials,...
Topic paths
Quick titles
How to Fix 'Access Denied' When Opening Command Prompt Log FilesResolve Outlook 0x800ccc0d Connection ProblemHow to Fix Remote Desktop Login Failures on Windows 11Windows Update Stuck at 0%? Here's How to Fix ItTask Scheduler Stuck Loading? Fix Permission Denied ErrorsRemote Desktop Timeout Fix GuideFix 0x80070490: Windows Search Proxy CorruptionWindows Defender Ubuntu Dual Boot Setup