I assume you're talking about a laptop. Get some Post-it notes and slide them under both CTRL keys to clean out any crud underneath them. You can also buy a cheap (under $10) USB keyboard and see if it happens with that. The fact that the problem is intermittent does by no means indicate that it's not a sticking CTRL key. CTRL-S is supposed to give you the search box, CTRL-P is supposed to give you the print box, CTRL-K is supposed to give you the keyword box, so I don't see where there could be any doubt about the sticky CTRL key.
My acer is only a few months old. Ironically, I had same problem on Toshiba, returned after one week.
For example: I touch p key and the printer box appears. I hit the s key and a search box shows.. or a k and the keyword box appears. . I can't go anything, have to shut system down, and this has caused a lot of problems as I have been in the middle of working and lose data.
I have been told it could be a stuck control key but that doesn't make sense because when I reboot the problem generally goes away. Unfortunately it returns.. and lately the entire email program is freezing as well.
since getting the computer, I have not installed any software other than aol . avg and upgrades to adobe.
I wondered if it was just happening on my email program, so I went to desktop to type a letter and can't .
please suggest what to do ???