My computer is a Dell Tower, it is currently running window 7. I did not have any problems until last night when I installed Panda Global security. I ran a scan and click the box that said shut computer after scan complete. This morning when I powered up the computer all I saw was a screen the read Dell and said F2-set up and F12-Boot menu. I pressed both these keys at different time and nothing happened. I shut the computer down several times, check all connections and I even unplugged it from the wall on two occasion all to no avail. does anyone have a suggestion?