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I am on a 14" Razer Blade Laptop running Windows 10. Some time after I installed VirtualBox, my left control key stopped working.

  • Right Control Key Works
  • I have uninstalled VirtualBox. Issue Persists.
  • Control+D results in D (Same is true with Control+Any Key)
  • When running the On Screen Keyboard (OSK.exe), pressing the Control key will light up the control key on the OSK.
  • Filter Keys, Toggle Keys, Sticky Keys, Mouse Keys are all off
  • I haven't spilled anything on the keyboard, usually the lid is closed. I tried using compressed air.
  • When I connect an external keyboard (MS Wireless) the same issue occurs.
  • When I restart the computer in safe mode, the problem is still present

This issue has stumped me, and its super frustrating. This is my development machine so I would rather not wipe it clean.

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  • there is virtualbox data here that might apply somehow? askubuntu.com/questions/729342/… The first thing i was thinking because your OSK shows it working, would be those extra "pointer options" in the mouse pannel stuff , "show location of pointer" would be another test of the ctrl interactions. – Psycogeek Mar 27 '16 at 16:18
  • Those articles are for when the control key is not working in the Guest OS - not in the Host OS. Besides, I uninstalled VBox, do not have Guest Additions installed, and I even booted into Safe Mode. – DHW Mar 27 '16 at 16:32
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This issue has been resolved.

It is not clear to me what exactly the problem was, but this is how it was resolved:

  • Removed and reinstalled HID drivers.
  • Installed Microsoft Mouse and Keyboard Center software.
  • Installed all Windows Updates (seemed to be a service patch missing)

Hopefully this helps someone else.

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