If he really wants to clean up his drive and doesn't mind completely clearing the whole thing, he could destroy all partitions, repartition it, then reformat. Would get rid of that partition and make original drive bigger. If a Windows install disk won't do it, try downloading a Linux install disc and burn a copy. Then use that to simply delete the partitions and setup new ones, then go back to the windows install disk and use that to format and install windows. I have had to do this before with a particularly stubborn Windows partition. Worked like a charm. Just make sure not to format using linux, or windows won't recognize the disk.