Checklists for software errors, setup, and tool workflows.

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Fix Git Push Rejected Non Fast Forward Error

You run git push and see: ! [rejected] main -> main (non-fast-forward)

Fix ERR_CERT_AUTHORITY_INVALID in Chrome Incognito Mode
You open Chrome incognito and hit a warning: NET::ERR_CERT_AUTHORITY_INVALID. Th...

Fix Windows Update Service Not Running for System Restore
You might see “System Restore did not complete successfully” or “Windows Update service is not ru...

Fix Windows Cannot Access Shared Folder: Network Path Not Found
You try to access a shared folder on another computer and get the error: 'Windows cannot acce...

Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fix Git SSL Certificate Problem with Proxy: Unable to Get Local Issuer
When you see fatal: unable to access 'https://...': SSL certificate problem: unable...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Git Push Rejected Non Fast Forward Error

Fix ERR_CERT_AUTHORITY_INVALID in Chrome Incognito Mode

Fix Windows Update Service Not Running for System Restore

Fix Windows Cannot Access Shared Folder: Network Path Not Found

Nginx Upstream Connection Refused: Diagnosis and Fixes

Fix Git SSL Certificate Problem with Proxy: Unable to Get Local Issuer

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