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Turn off Cortana permissions, block Cortana with Group Policy or Registry, and remove the Cortana app on Windows 10.

Turn off Fast Startup in Windows 10 or 11 from Power Options or Command Prompt and understand dual-boot issues.

Remove Windows lock screen tips, suggestions, and Spotlight promotional text on Windows 10 and Windows 11.

Back up, edit, add, undo, and restore Windows Registry values safely on Windows 10 and Windows 11.

Create a Windows restore point before driver updates, software installs, registry edits, and other risky system changes.

Create Windows 11 installation USB media with Microsoft Media Creation Tool or Rufus for unsupported hardware.

Create a Windows local account during setup or from an existing install, switch from Microsoft account, and understand local account limits.

Securely wipe a Windows PC drive or secondary drive before selling, donating, recycling, or reusing it.

Clear Windows temporary files from the user temp folder and Disk Cleanup, and understand what browser cache and system temp folders do.

Create a Windows batch file, run it, add it to startup, use basic commands, comments, and administrator mode safely.