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 and Permission Denied

If you see connect() failed (111: Connection refused) or connect() failed (13:...

Fix Git 'index.lock file exists' Error
When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....

Fix DNS Probe Finished NXDOMAIN Not Working on WiFi
If you see "DNS_PROBE_FINISHED_NXDOMAIN" in Chrome while connected to WiFi, your browser ...

Fix npm install Permission Denied on node_modules
When you run npm install and see a permission denied error involving node_modu...

Fix Cloudflare 522 Error: Increase Timeout Settings
If you see a Cloudflare 522 error, it means your origin server took too long to respond to Cloudf...

Fix Chrome Certificate Error Due to Antivirus Interference
You're browsing in Chrome and suddenly see a red warning: Your connection is not priv...


    Issue queue
Sitemap
Fix VSCode Breakpoints Not Hit in launch.json
Fix Windows 11 Blue Screen by Uninstalling Update in Safe Mode
Speed Up Cloudflare DNS Propagation
Windows Defender Real-Time Protection Error Fix
Windows Security App Not Opening Access Denied
Fix Windows Search Index Not Indexing New Files
How to Unlock a Locked Account for Remote Desktop
Chrome Keeps Crashing on Startup? Fix the Loop
Fixing VS Code Git Authentication Failed Error
Windows 11 Update Stuck at 0%? Fix BITS Service
How to solve nginx config test failure unexpected end of file
Troubleshooting npm run build Errors on Windows
Desk note

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