How to Fix Windows Defender Not Turning On
Windows Defender (now called Microsoft Defender Antivirus) sometimes refuses to turn on or stay o...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix OpenVPN TLS Handshake Failed Error
If you see "TLS Error: TLS handshake failed" in your OpenVPN client log, the connection cannot es...
Fix Windows Defender 502 Bad Gateway Error: Configuration Guide
If you're seeing a '502 Bad Gateway' error when opening Windows Defender, it usually means a netw...
Windows Security Antivirus Not Detecting Threats: How to Fix
If you suspect Windows Security (formerly Windows Defender) is not detecting threats, you might s...
Fix Windows Activation Port Error 0x80072efd
If you see error 0x80072efd when trying to activate Windows, the message often says something lik...
Fix Microsoft Store Error 0x80073cf0: App Won't Start
When you try to open the Microsoft Store and see error code 0x80073cf0, the app either fails to s...
Topic paths
Quick titles
Create React App Node Version FixHow to Fix Windows Update Error 0x80070002Clear Task Scheduler Cache via Command LineFix Defender Issues by Clearing CacheBitLocker SSL Certificate Error: Common Causes and FixesFix Remote Desktop DNS Issues on Windows 10How to Speed Up Windows Search PerformanceTroubleshooting SSH Timeout Errors