Knowledge base for software setup, errors, and daily tool work.

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...

Resolving Python Dependency Conflicts with Pipenv

You've added a package with pipenv install, but the output shows a conflict erro...

How to Fix ERR_NAME_NOT_RESOLVED via Router Settings

If you see ERR_NAME_NOT_RESOLVED in Chrome, your browser can't translate the...

How to Fix Cloudflare 521 Error on Apache Servers

If you see a Cloudflare 521 error, it means Cloudflare’s network cannot reach your origin server....

Fix Nginx Upstream Connection Refused in Proxy Pass