For everyone still having this problem:
Your user profile may be corrupted. This means you have to boot your laptop in safe mode and make another user account.
To boot your laptop in safemode, press F8 right before the windows load screen would pop up while starting your computer and you'll be asked to select an operating system. Press F8 again and select Safe Mode from the options and press enter. You'll be taken back to the previous screen and it'll say "Booting in Safe Mode" or something likewise at the bottom. Select your operating system and press enter again. Your laptop will continue booting and bring you to the login screen.
Log in on admin or another user with full control. Go to Start> Configuration Screen and click on Users. You can create a new account from here. Notice that only users with full control will show up here while you're in safe mode, so don't be confused if you can't find a restricted user here, existing or newly created. After that go to http://support.microsoft.com/kb/811151
to copy the files from the corrupted account to the new account. You'll need three accounts to do this, one of which is neither the corrupted or the new account and has full acces.
I hope this helps.