Here's how to remove a game's leftover icon from the Windows 7 games list. Sometimes when you uninstall a game, its icon remains in the Windows 7 games list and is put into a category called "unspecified". There appears to be no way to remove the leftover icon. However, the leftover icon will be auto removed if you delete the game's leftover folder usually in...
[on 64 bit Windows] C:\Program Files (x86)
[on 32 bit Windows] C:\Program Files
This is a very annoying problem, and Microsoft should do something about it. But I hope you guys find this tip helpful.