I have spent hours trying to split a 120GB harddisk in two to have XP and Vista for dual boot. Sometimes I manage to tell DD10 to split at 60GB. I then go through several reboots only to find that nothing has happened. Absolutely nothing. There is no new partition. I have also tried using some unallocated space and then sometimes I get a new partition. However, I can't change its size at all. DD10 protests and says it can't be done. All this in XP. But when I finally gave up and just installed Vista 64 I had similar problems there. So far I have not at all got from DD10 what I bought it for. Only it has been a help for me changing dynamic disks to basic and keeping data. But that was not my primary purpose for buying it. Luckily True Image has been a help by restoring things for me during several experiments with installing new XP or Vista these days.