I have a problem in my Partition F; when I view it from the My Computer Window it says it has 12.6 GB free out of 18.7 GB. The problem is that I'm not even using 6.1 GB - I hardly use less than 4 GB of it (Flatout 2 and Counter-Strike). So what happened to the remaining 2 GB? Is this a software error or a hardware error?