Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

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Fix Jupyter Kernel Not Starting in Anaconda

When you launch a Jupyter notebook from Anaconda Navigator or the terminal, the kernel may fail t...

Fix OneDrive Sync Error 0x8004de40 (SSL Certificate)

If you see error 0x8004de40 when syncing OneDrive, it usually means your computer cannot verify t...

Fix Microsoft Store Not Launching from Start Menu

You click the Microsoft Store icon in the Start Menu, but nothing happens—no window, no error. Th...

Fix Microsoft Store App Version Mismatch Errors

You open a Microsoft Store app and get an error about a version mismatch, or the app won't start ...

Fix SSH Host Key Verification Failed on Windows 10

You try to connect to a remote server via SSH on Windows 10 and see: Host key verification ...

How to Configure Windows Defender Firewall Settings for a Network
If you're having trouble with network connectivity or need to allow an app through the firewall, ...