Simple, just format it again using the restore disc for the desktop. If you don't have this anymore, contact Dell about getting a replacement.
I re-formatted my hard drive (Dell Dimension E520 with Win XP) after a virus killed it. The issue is, I did it with my laptop windows version. Now the computer does display anything on the monitor. Without the monitor working, I don't know what to do or how to fix it. The monitor works when plugged to my laptop, power is on. How can I turn on the monitor to download the proper driver or boot the computer? Thanks for any advice you can give me.