My computers been fine until one day....I booted up my computer and it comes to my welcome screen where I click on my account(its the only one there). It doesnt usually bring be to this screen but I click it and all that happens is it says "loading your personal settings", I get logged in for about half a second and it brings be back to the welcome screen and says "saving your settings" as if I just logged off....can anyone help me? I tried to repair with the windows cd but it didnt work.