Hi all I've installed Windows7 and it seemd OK but I'm faceing a problem. after leaving the computer for awhile, when I try to use it again, I'm getting a screen with my user account on it (the only account, there are no other users)and below that the word "LOCKED" and it is really locked. the only way is to restart the computer. let me point that I have not installed a password when installing Win7. is there any cure for the problem? Thanks.