Windows Defender Missing from Settings After Update: Fix
After a Windows update, you might open Settings and find that Windows Defender (now called Micros...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Security Offline Installer Error 0x80070643
You're trying to install Windows Security (formerly Windows Defender) using an offline installer,...
How to Resolve PowerShell DNS Lookup Failure
When PowerShell fails to resolve a hostname, you might see errors like Cannot resolve the a...
Outlook Web Blank Screen When Opening Email: Fixes
When you click an email in Outlook on the web and get a blank screen, it's usually a browser or c...
Fix 'Windows Defender Command Not Found' After Malwarebytes Install
After installing Malwarebytes, some users see 'command not found' when trying to run Windows Defe...
Resolve 502 Bad Gateway Using Command Line Tools
A 502 Bad Gateway error means a server acting as a gateway or proxy received an invalid response ...
Topic paths
Quick titles
BitLocker 404 Troubleshooting GuideHow to Solve Outlook Full Mailbox ProblemMicrosoft Store High Memory Usage: Troubleshooting ChecklistResolve Error 0x8007232b Windows 10 ActivationSet Chrome to Launch Automatically on Mac LoginHow to Fix BitLocker Cannot Connect to Recovery KeyWindows Search High CPU Registry FixResolve Windows Defender Authentication Failure from Group Policy