I'm having trouble within my hard drive. When I startup the machine tells me there is no hard disks detected, when I go into the BIOS it says it finds my hard drive. When I try to load windows, I get a blue screen claiming: UNMOUNTABLE_DRIVE_VOLUME I followed the instructions from DELL and tried restoring factory settings, but although it told me I had a primary drive as my hard drive and secondary drive as my CD drive, it didn't do much else. I tried deleting the partition through the windows setup but it told me it was "unable to delete the partition". A friend suggested taking out one the non-Dell ram sticks to see if that would help - it didn't. What else can I do?