Question Mouse causing keyboard to spam "C"


Oct 18, 2017
My mouse is causing my keyboard to spam the letter "C" as well as causing the keyboard to constantly hold down "CTRL" At first I thought it was my keyboard but even unplugged it will spam "C" but when I unplug just the mouse, it stops. If I restart my PC I'm okay for a few minutes but then it starts again. I've tried uninstalling and re installing drivers but nothing seems to work.

Logitech G502 Hero mouse
Redragon keyboard

Ryzen 5 2600
Rtx 2060 Super
16gb DDR4 3600mhz


Sounds a lot like malware infection. :rolleyes:

That is more evidenced by when you restart your PC, it doesn't instantly do it, but starts doing it after some time (when malware activates).
Since if the issue would be with the mouse, you'd get same issue even in BIOS/Windows log-in screen.

Also, mice, on their own, have 0 control over which key buttons on KB are pressed. Only the later mice, that have software with them, whereby you can remap the mouse buttons to act like KB keys, have that ability. But i doubt that you've mapped your mouse buttons to act as "CRTL" and "C".

Crtl + C is Copy command, where data is copied to clipboard. Malware can easily exploit the clipboard, to transfer data along (out of your PC).

You can try AV software, e.g MalwareBytes and the like.
But if that doesn't help, format your drives and make a clean Win installation. As of why i said "drives", malware can live on every drive you have connected to your PC, and not just the OS drive. So, only wiping OS drive may not fix your issue.

Oh, if the malware is BIOS rootkit, clean Win install will not help. What helps, besides wiping all drives, is also wiping BIOS chip aka flashing BIOS to newer version (BIOS update). On worst case scenario, you're looking towards MoBo replacement.
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Win 11 Master
It could be misbehaving logitech software, since it happens after you logon. Or another program conflicting with mouse

have you tried a clean boot to see if it makes any difference
Try a clean boot and see if it changes anything - make sure to read instructions and make sure NOT to disable any microsoft services or windows won't load right -

It doesn’t delete anything, it just stops non Microsoft programs running with start. Easy to reverse.

if clean boot fixes it, it shows its likely a startup program. You should, over a number of startups. restart the programs you stopped to isolate the one that is to blame.

have you tried mouse on another PC to see if it does it there? it might be a weird defect.
Apr 1, 2023
Install an antivirus program, such as Avast, on your computer and check the entire hard drive for viruses. It is also possible that some system files of Windows have gone wrong. Try also to download CCleaner and clean your system with it. If it doesn't help, reinstalling Windows with a full disk formatting should solve the problem.