Use SysKey Utility to lock Windows computer using USB stick

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Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.


  1. Phrozencrew2020

    Thanks. I already use this built in security features.

  2. bogidu

    So, here’s a question. When a user loses the usbkey, what do you do? Logic would dictate having a backup of the usbkey, however when you insert a different key it is assigned a different drive letter rendering the backup useless.


    Also with the microsoft support scan being so prevalent how can you reset the syskey once they’ve used it to lock you out? particulalrly hard to do on the uefi systems.

  4. Dave Earle

    How come when I type in ‘syskey’, I get a message from Windows that it can’t find ‘syskey’? I on Windows 10; is that not necessary, or built into Windows 10? I was just curious, because I know that Microsoft tech support scams use syskey, to lock users out of their own computers, so I was researching ways around that; of course, the BEST way around that, is to just hang up on them! lol

  5. Syskey.exe utility is no longer supported in Windows 10 v1709 and later.

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