Software troubleshooting desk

Practical fixes for tool errors, setup blocks, and workflow issues.

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fixing Nginx Upstream Connection Refused in Load Balancing

When Nginx load balancing returns upstream connection refused, it means one or more ...

Fix Windows 11 Installation Assistant Stuck at 99% in Safe Mode

If you're running the Windows 11 Installation Assistant in Safe Mode and it gets stuck at 99%...

Fix Cloudflare Wildcard Subdomain SSL Not Working

You set up a wildcard SSL certificate for your domain on Cloudflare, but some subdomains still sh...

How to Fix DNS_PROBE_FINISHED_NXDOMAIN in Chrome

When Chrome shows DNS_PROBE_FINISHED_NXDOMAIN, it means the browser can't fi...

Fix Docker Desktop Engine Stopped Due to WSL Issue

You start Docker Desktop, but the engine stops almost immediately, often with a message about WSL...

Fix Nginx Configuration Test Failed: Duplicate Listen Error

When running nginx -t to test your configuration, you may see an error like "...

Issue queue
Sitemap
How to Debug Nginx Configuration Test Failures
Fix Windows Update Error 0x800f081f After SFC ScanNow
Docker Compose Environment Variable Override Not Working: Fixes & Checks
ERR_NAME_NOT_RESOLVED DNS Fix Guide
Mac Git Troubleshooting: index.lock File Exists
Windows Defender Stuck on Turning Off Real-Time Protection Fix
Fix Chrome Startup Crash via Task Manager
Docker Compose Port Mapping Troubleshooting
Clean Boot Guide for Windows 11 Update Stuck
Restore Chrome Sync After Cache Clear
Fix Windows Explorer Restarting After Crash
Fix Chrome High Memory Usage
Desk note

Troubleshooting paths
Home
Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities