Well if it was a desktop pc,& all hardware is correct,at power off,
remove the battery,locate the CMOS pin,move from 1-2 position to
2-3 for 15 seconds or so,then back to 1-2 position,replace battery,start
pc.At pc start up,enter the BIOS,reset date/time & adjust for any add-ons,
save & exit BIOS,let xp start.This returns all functions to default (as it
left the mfg),if a laptop uses or can be set up as same,then try the
procedure,it from mfg...