My friend recently gave me her unused PC with Windows Vista installed. My friend has been helping me to get the sound working on the computer (I can't hear anything). Then he decided to update windows vista and that's what we did. Now after the updates, everytime I try to turn the computer off - it remains stuck on the "Windows is shutting down screen" that I have to manually power off. I have been hearing not so favorable reviews.. is Windows 7 good? or should I just wait for Windows 8?