Fix Windows Defender Real-Time Protection Stuck Off in Windows 11
You open Windows Security, see real-time protection is off, click the toggle, and it turns back o...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...
Windows Explorer Keeps Restarting in Windows 11: Fixes
If Windows Explorer keeps restarting on your Windows 11 PC, you'll see the taskbar and deskto...
Fixing Cloudflare 521 Error: Origin Unreachable
When you see Cloudflare error 521, it means your origin server is refusing the connection from Cl...
Fix Cloudflare 521 Error: SSL Configuration Steps
If you see a Cloudflare 521 error, it means Cloudflare can't establish a TCP connection to yo...
Fix Windows Defender Real-Time Protection Not Starting
If you see a yellow warning or a message that real-time protection is off, Windows Defender’s cor...
Topic paths
Quick titles
Docker Build Context Canceled: Causes and FixesFix 'Git Remote Origin Already Exists' ErrorDocker Desktop Engine Stopped Hyper-V Error GuideResolve Git index.lock Error – Step-by-Step GuideCloudflare Origin Certificate Permission Denied: How to FixBreakpoint Not Hit in VSCode? Check Source MapsHow to Fix VS Code IntelliSense Not WorkingNode.js Memory Limit in Docker Containers