if i explore my sytem drive and highlight all the folders in it without going any deeper than the first level of folders then go to file and select properties it tells me 7.66 gigs is the size of these files and folders.but when i look at the drive properties it says i am using 12.9 out of 16.7gigs, what up wit that? i had a beta verion that expired on the same drive but it is seperate from the current o.s.(installed to a different folder)could this be my problem or cause other problems unseen or in the future?