I've been having this problem for several months now. The CTRL key activates in a kind if blinking manner, with no specific events triggering it. Typing normally is interpreted by the system as CTRL+ combinations (eg. simply typing the letter 'p' is read
as CTRL+p which is the print command, scrolling is read as CTRL+scroll, which zooms in and out of pages).
Launching the on screen keyboard shows both the CTRL keys blinking as though I'm hitting them intermittently, while I'm not even touching the laptop.
Details about the laptop:
HP pavilion 15 522tx (a year and six months old)
(the problem started occuring four months back, no system changes were made)
Windows 10 Home 64 bit
No specific keyboard drivers available on HP support website.
Here's what I've tried till now:
-disabling the keyboard drivers from the device manager (even without the driver, the problem persists). Rebooting the system automatically installs the factory driver back.
-prying open the keys and cleaning thoroughly for any dirt or static.
(without the contact cups also, the keys activate, so I'm assuming it should be a software issue)
-connecting an external keyboard to see if its the internal keyboard hardware at fault.
-removing all but one languages from the 'language and input method'.
-thorough system scans for malwares and viruses.
-system reboots, hard resets, pressing both CTRL keys simultaneously, pressing CTRL+ALT keys together, and pretty much every other suggestion people had on online forums.
I've noticed quite a number of people have faced this problem but there's no legitimate solution to it yet. This seems very strange. Some got it working by hit and trial. I haven't been so lucky i guess. Really hoping someone could help me too. Thanks.