Checklists for software errors, setup, and tool workflows.

Checklist for Fixing Windows Security Startup Failure

When Windows Security (formerly Windows Defender) fails to start at boot, you may see an error li...

Fix PowerShell Token Expired Error 401

If you're seeing a 401 status code with a message like "token expired" in PowerShell, it usually ...

Fix Windows Defender Service Not Running

If you see "Windows Defender service not running" or a red warning in Security Center, the underl...

Go Modules Proxy Cache: Clear and Reset Steps

If you're seeing stale or corrupted module versions when building Go projects, the local module c...

Fix PowerShell Cannot Connect to Office 365

You open PowerShell, run a command to connect to Office 365, and get an error: "Cannot connect to...

Fix CMD Service Unavailable Due to Group Policy

Situation

You open Command Prompt and see an error like "Command Prompt has been disabled...