Fix Windows Security Service Not Starting Error
You click the Windows Security icon, but it doesn't open. Or you see an error saying the service ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Windows Update Error 0x80070005 Access Denied
When you see Windows Update error 0x80070005 with the message "Access Denied," it us...
Fix Remote Desktop Token Expired After Update
After a Windows update, you might see a 'token expired' or 'your credentials did not work' error ...
Fix Command Prompt Service Unavailable After Update
After a Windows update, you might see the error "Command Prompt service unavailable"
Fix Windows Activation Offline Installer Not Detecting Key
You've downloaded the offline installer for Windows activation, but it keeps saying it can't dete...
How to Fix Outlook Setup Error 'Cannot Start Microsoft Outlook'
You open Outlook and see: "Cannot start Microsoft Outlook. Cannot open the Outlook window."
Topic paths
Quick titles
Troubleshooting Outlook Public Folder Permission ErrorsWindows Activation Service Unavailable After Update FixWindows Activation Key Not Recognized: How to FixTask Scheduler Alternative Not Opening on macOS? Try These StepsTeams Cache Corruption: Step-by-Step FixTroubleshoot Chrome DNS Connection FailureTask Scheduler Version Mismatch Permission FixWindows Search Not Working: Fixes That Actually Work