loading screen problem

Hi, i have a problem.......the computer is loading the way it is loading but after i put the password and click ok it goes to the desktop but instead of showing everything it is just a blue screen....whats happening? I installed a game the night before and shut it down and I woke up with tis problem

As a first try I would run a System Restore to a point prior to that game installation.

Try booting into Safe Mode by repeatedly tapping the F8 key after your BIOS POST but before Windows starts.

Choose Safe Mode and then choose System Restore. Pick a date prior to your game install.

That install itself should have created a Restore Point.