I don't have a DELL computer but I tried that method for DELLs. It didn't work. I have already disabled the net time anyway. I have a mixed bunch of old parts on the system.

FIC MB with a Celeron 400
WD 6.4gb & 27.5gb HDs
196 mb PC133 RAM

All old parts but it seems to run fine except for the time problem. I have checked and the BIOS clock remains set. When I first turned it on I checked the BIOS and all settings including the time were still set so the battery must have still been ok. I did change it anyway but still no help. I thought maybe it was something simple that I may have missed since I am not too familiar with XP.