Hi Guys. I hope this is in the right Forum. Briefly. I tried to reformat my dads hard drive to reinstall windows 7. It was in 2 partitions, so i ran the windows 7 disc and it ran through the motions, i formatted the c to re-install windows and it wouldn't let me. I went into dos under diskpart to try and format it that way, still no luck. I connected it to my computer then under disk managment deleted the 2 partitions so there was only 1 now which had the size i.e, 600GB Unallocated. I connected it back into my dads computer and ran the set-up again. Now the computer wont even detect the drive. I need to re-format the drive to like factory default, is this possible, also do i have to do it in dos, I really hope you tech wizards ca help me. Thanks for your time. Kevin.