Hi - I am very proud that I was able to remove failed drive and replace it with a new one. I am not a tekkie person. This is for Dell 2305 all in one system. Anyway, I ran the system recovery disks that I made when I purchased the system 5 years ago. Everything was getting installed - system was recovered and it went to step 2 which is putting on all the services that were on the system when I purchased it. Suddenly, a cmd window came up with the following msg - unable to locate a valid partition to mount. It then would shut down, restart, go to the welcome screen and do the cmd window again. I have been told that the new drive is looking for a partition that was on the old drive and was copied over to restore disks. Does that make sense? Anyway, if someone could pls tell me what I should do, I would love it!!! Thank you so much.