Checklists for software errors, setup, and tool workflows.

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Jupyter Kernel Not Starting After Update: Fixes

After updating Jupyter or its dependencies, you might see the kernel die immediately or hang with...

Fix Windows Security Proxy 504 Gateway Timeout Configuration

When Windows Security (Windows Defender) reports a 504 Gateway Timeout error through a proxy, it ...

Fix Microsoft Teams Configuration Permission Denied Errors

When configuring Microsoft Teams, you may encounter a 'permission denied' error that prevents cha...

How to Fix OneDrive Sync Pending Files Not Uploading

You see files in OneDrive with a 'Pending' status that never upload. This usually means the sync ...

Fix VirtualBox Kernel Driver Not Installed Error 0x80004005

You try to start a virtual machine in VirtualBox and get the error: Kernel driver not ins...

Fix 'Port Already Allocated' Error in Windows Defender on Windows 10
You may see an error like "Windows Defender Firewall cannot use port X because it is already allo...