We have two Dell computers and one of them has gotten corrupted and needs to be re-loaded.  The problem is now that I have a few recovery DVDs and can't tell which DVD goes with with computer?  They both say "Reinstallation DVD" and "Microsoft Windows XP Media Center Edition 2005" except one also says "with Update Rollup 2".   The first one has a maroon label and the second one has an orange label. The computer that needs to be reloaded is a Dimension 5100C.  I'd appreciate help with this.