It can be any number of things. For example: Is it reading the free space as FAT32 or NTFS? Is this a purchased program or shareware? In the "older" days back in Win95 and 98 I used to set my pagefile as RAM wasn't cheap and the more speed the better. Can I ask, why do you feel you need to set the pagefile in XP? No matter how much RAM one has, Windows is going to page out and with today's big hardrives, restricting the page file doesn't seem necessary.