Checklists for software errors, setup, and tool workflows.

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Fix Outlook Add-In Conflict That Prevents Startup

You launch Outlook and it crashes or hangs before the main window appears. A common cause is a co...

Windows Defender Service Not Starting in Windows 10: Fixes

If Windows Defender won't start in Windows 10, you might see error messages like "Service did not...

Fix Jupyter Kernel Not Starting on Windows 10

When you launch a Jupyter notebook and the kernel never starts—or shows a 'Kernel error' or 'Conn...

Fix 'remote desktop command not found' on Linux

When you type a remote desktop command like rdesktop or xfreerdp in a L...

Fix PowerShell 504 Gateway Timeout Error

You run a PowerShell script that calls a web API, and after a while you get a 504 Gateway...

Fix Windows Defender Not Starting Due to Dependency Conflict
If Windows Defender won't start and you see an error about a dependency service or group failed t...