I've recently got Win 8.1 Pro and a new keyboard and mouse(Slimstar c110). The keyboard worked but suddenly both of my Ctrl keys aren't working.

I tried doing tests and doing shortcuts but they aren't working, I'm almost 100% sure the keys themselves aren't broken.

Are there any options that could have disabled my Ctrl keys?

  • Can you elaborate about those tests you did? – vembutech Oct 25 '14 at 15:46
  • I literally downloaded a program that lets you click a key and it shows the key you pressed on screen, I also tried doing some simple stuff like ctrl+c ctrl+p – AlexaCOl Oct 25 '14 at 15:47
  • If neither control keys are working anymore, then it means windows somehow registers that a control key is being pressed. This is known as a stuck key. This can happen if you hold a key while switching to or terminating a process. If you press that very same ctrl key again, it should resolve your issue. If you use a program to remotely connect to this computer, and you hold ctrl while disconnecting, the key may get stuck as well. It can also be that a shift or alt is being stuck. In any case, a reboot should solve your issue. Did you attempt a reboot? – LPChip Oct 25 '14 at 16:01
  • 4
    Try using a linux live CD and see if your control keys would work or not. – Prasanna Oct 25 '14 at 16:21
  • 2
    Check if ctrl key works over On screen keyboard – pun Aug 7 '15 at 15:08

I had the same problem for months, both Ctrl keys and back arrow key did not work.

I had to reinstall Google Chrome, all keys then started working again.
This was possibly by accident or a related Chrome issue.


Press alt+ctrl+fn to fix.

I am not sure why this happens, but I was also not able to use both the Ctrl keys and this worked for me. Please find below the related thread.



Did the ctrl key ever work? You mention the keyboard is new, don't exclude the possibility of a manuf. defect.

That being said, there is a definitive way of diagnosing between hardware or software. Try booting to a linux live CD (or any other 3rd party O.S.), like mentioned in the comments. Here's a list of free software that will allow you to make the diagnosis. Ubuntu, DamnSmallLinux, Comodo Live, Hiren's BootCD, Ultimate BootCD

"Almost 100% sure" isn't very certain at all is it? Also, there's no point testing the keyboard using software if the issue is with the same software it question.


I i cleaned inside of my keyboard with a soft napkin and vacuumcleaner incredibly control keys worked before cleaning both ctrl keys wasn't working.

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.