You might want to try a program called CCleaner. It is freeware that cleans up your computer . When you reenstall a program like SH4 there are some remnants of files left on your computer. In my experience with a reenstall I found out that my options for the game were not deleted. I would go to help and support and look for files and folders after the game is deleted. Then get rid of any files that are still there. You will be surprised at what you might find. Then do a disc cleanup and defragment your hard drive. After you do that you can use CCleaner to "wipe free" the free space on your hard drive before you reenstall. It takes a lot of time to do this but is worth it.
