have you tried looking up error code at microsoft
<A HREF="http/msdn.microsoft.com/library/default.asp?url=/library/en-us/w2kmsgs/6090.asp" target="_new">http/msdn.microsoft.com/library/default.asp?url=/library/en-us/w2kmsgs/6090.asp</A>
try going here and read it might help you and if not try this web site
<A HREF="http/www.google.com/search?q=KMODE_EXCEPTION_NOT_HANDLED+&btnG=Google+Search" target="_new">http/www.google.com/search?q=KMODE_EXCEPTION_NOT_HANDLED+&btnG=Google+Search</A>
I'm having a similar problem with my XP installation too.
It comes up with PAGE_FAULT_IN_NONPAGED_AREA ( error 0x50 )
My system is Asus P4B, P4(1.5G), 256Mh(PC133Ram), Geforce AGP Video card, 20G Maxtor H/D.
I went to microsoft site for more info but still unable to fix that problem.
I'm going to swap my RAM with another and see if it will work. Anyway, any progress, I'll let you giys know..