Crossfire Client MFC Error

so my friend reset his computer (rebuilt) and his crossfire wont work anymore. it has nothing to do with the files, we even checked by taking my fiels and putting them into his program folder. his verion of windows xp isnt legit meaning its fake and so he says he cant update his service pack. since his service pack isnt up to date, can thi be the reason cf isnt working for him? he really wants to play and hasnt played in like 2 months. please help.

uhm..
maybe download CF again
that was worked on my pc when i had that

hes downloaded and reinstalled it 3 times already