Checklists for software errors, setup, and tool workflows.

Fix Nginx Redirect Loop After SSL Certificate Install

You installed an SSL certificate, and now your site redirects in a loop. The browser shows 'E...

Fix Windows Update Error 0x800f081f Stuck or Failing

You see error 0x800f081f when Windows Update gets stuck or fails to install an update. This usual...

Fix Windows 11 Update Stuck at 0% with Service Not Running

You click Check for updates, see 0% for ages, and maybe an error like 'Windows Update service...

Fix Windows Update Error 0x80070005 by Taking Ownership

What Causes Error 0x80070005?

This error usually means Windows Update doesn't have pe...

How to Fix Git Detached HEAD State and Undo Changes

You run git status and see something like "HEAD detached at abc123". This ha...

How to Fix Python Dependency Conflicts in a Virtual Environment

You activate your virtual environment, run pip install, and get an error about conflicting depend...