Hi I have a 450GB hard drive and had only used up less than half of it.. or so I thought. Yesterday for some reason my disk space had been reduced to 38GB remaining. I ran WinDirStat and it told me my hard drive had 191 GB used space (which means I should have plenty of extra space) but when I right click the drive and look at properties it tells me that I have 416 GB used space! Help what is going on here?