Well a time ago my key on the keyboard "K" stopped working for some time and I had to push it a lot until it worked. Then I cleaned my keyboard but the problem still exists. Now the problem has changed for bad..... at random times my... hmmm I don't know what, but at random times windows or w/e starts typing the letter "K" and I have to push it down several times untill it stops. About a week ago I published a thread with a problem called beeping (after the bios loads, a black screen appears and starts beeping). This was caused by the pressing of the letter "K". I don't know how to fix this. I've reinstalled windows several times but it didn't work. I am using laptop Toshiba A-300. Antivirus Nod32. Please help me, because this problem is going further and further.