Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you run npm install or yarn install and see an error like en...

Chrome Certificate Error Invalid Authority: Diagnosis Checklist
When Chrome shows NET::ERR_CERT_AUTHORITY_INVALID and refuses to load a site, it...

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

Fix npm ENOENT package.json Not Found Due to Wrong Directory
You run npm install or npm start and get an error like ENOENT: no...

Git Merge Conflict: Keep Both Files Instead of One
When you run git merge and get a conflict, Git stops and marks the conflicting files...

Fix 0x800f081f Error in Windows 10 Update
When you see 0x800f081f during a Windows 10 update, the update typically fails w...