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This started happening with a brand new Windows 10 machine. No matter what brand of USB based keyboard I use I keep having the same problem.

Here are the system specs: I will add any further information as necessary.

Dell OptiPlex 3040

Windows 10 Pro x86-64

Dell USB keyboard model KB216

Things I have already attempted:

  • This suggestion from SuperUser
  • This other post on SuperUser
  • Swapping to a different USB port
  • Updating BIOS
  • Updating device drivers
  • Trying a different keyboard
  • Dell Diagnostics scans
  • Turned off "Turn on Toggle Keys by holding down the NUM LOCK key for 5 seconds" in Control Panel >> All Control Panel Items >> Ease of Access Center >> Make the keyboard easier to use
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1 Answers1

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It turns out this bizarre NumLock issue is the result of a Microsoft Access bug in a piece of custom software.

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