My home computer C: drive is filling up and I'm getting low disk space warnings. Its a system I built a couple years ago and is running Windows Vista 64bit Home Premium edition. I partitioned the primary hard drive into C: drive and E: drive. I intentionally made the C: drive partition small ~ 50GB, as I wanted to have only the operating system installed on it. All storage and programs were to reside on E: or one of the other 2 drives. I was thinking that if I ever had to reload the operating system I wouldn't lose any of my programs, files etc because they were not on C drive with the OS. I may have neglected to set some defaults in the OS to tell it to store data on E: drive instead of C: or, my planning was faulty. Either way, I find myself running out of room and the computer is acting pretty sluggish. I think I need to extend the partition on C: drive. I have more physical room on the disk but Windows can't extend the partition into it because it would have to move the neighboring partition E:, and it can't do that. Can anyone recommend a program to extend the active partition containing the OS? Thanks. Any help is appreciated.