I am trying to get a Dell Dimension 4500 working again. Don't know whether it worked when last taken out of service. The keyboard and mouse had been lost, so I replaced them with a V7 USB multimedia keyboard/mouse combo. Then I tried to boot, and received errors about corrupted files. After using Bart PE to replace sevral files, and just getting more different error messages, I used the recovery console and ran chkdsk /r and those errors went away. But I started getting bluescreens complaining about checksum errors on various dll's. After replacing a couple of those using Bart PE, and just seeing the same error recur with a different dll, I used the Dell XP setup disk to repair the installation. Now I get an error message: "Setup can not access the required Windows XP configuration information. This indicates an internal setup error. Contact your system administrator." The Microsoft kb says this message -- except using "set" instead of "access" -- indicates non-XP-compatible hardware. I checked the MS compatibility site, and it did not find anything by the manufacturer V7. So I called the vendor, who assured me that the keyboard/mouse combo is XP compatible, although it may require a driver. The manufacturer's site says the unit is plug-and-play, and does not offer a driver. Any suggestions as to what may be the real problem with this computer? Thanks.