Recently, my keyboard seems to have a life itself. It all started when the CAPS LOCK light blinked sometimes from nothing... then it started to turn itself on and off whenever it wants. I suspected it was a malfunction from the keyboard, but my computer (Dell Inspiron 3540) only have a year and I do not use the CAPS key very often.
More recently, the left shift is not working with the keys 2, w, s and x. If I want to make an uppercase of those letters I have to press the right shift. Thats when I started to think it could be a malware or something like that, because those keys work just fine, but only if i'm not pressing the left shift key.
Strange thing is that everytime the computer starts, the CAPS key is turned on automaticaly. Also, when I try to type the password on my emails website, it says the CAPS key is on, even if it isnt. Ive got the same mensage from when I was registering to bleepingcomputer.com.
Ive run a complete scan with my old antivirus (McAfee), but it found nothing. Runned malwarebytes anti-malware, and it did find a PUP, but even after the exclusions, the problem persists. Ive also run a complete scan with Microsoft safety scanner and later with windows defender, and they did find some PUPs, but again, after the exclusions, the problem persists.
Last thing, my touchpad seemed to stop working when I disconnected my USB mouse... then even after ive reconnected the mouse, it wasnt working for sometime.
Also, the CAPS light on my keyboard went crazy when I was running some of the scans... just like when it all started.
All the scans were done using normal mode, not safe mode. I'm using Windows 8 in a Dell Inspiron 3540. Could anybody help me and confirm if is that a malware or a keyboard malfunction? Cause Ive seem some people saying that they were having the same problem, and even a keyboard change didnt solve the problem.