My computer (running xp sp3) keeps minimizing windows or deselecting them automatically. It's so bad that I can't do anything before the windows close. (typing this on my phone) and no, I'm not prssing alt tab, I'm not touching anything when it happens. Had anybody else had this problem? And if so how did you fix it? Please help my pc is completely unusable because of this.
Sounds like a hardware problem to me. I would suggest trying a different keyboard and mouse (one at a time, though, to eliminate each one individually as the cause).
If it still happens (with the new devices), boot into Safe Mode and see if the problem persists. Follow Jason's advice on
I don't believe there is any key combination or other input device that could readily minimize windows by accident (i.e. stuck key, etc). It sounds as if you have some software on the system that's intentionally or unintentionally minimizing the windows. You might be able to boot into safe mode to investigate the problem.
If safe mode doesn't get you going, you can try msconfig (depending on how quickly the windows minimize). Hit Windows+R to bring up the run dialog, then type
Go to start menu and search
Look for something called (interactive services detection) and uncheck it.
Apply and ok.
After that go to task manager and click on