adrpan.exe...i searched for it on google, msn and yahoo. came up with nothing.
can only suggest you remove it from ur start-ups. either thru winxp/sp2 utility or use ccleaner (
www.ccleaner.com). also use ccleaner to clean ur pc junk.
then scan you pc with anti-virus (avast or avg) and anti-spy (your spydoc AND adaware or ms anti-spy). if u can also download and use ewido, great !
if u can, do post ur hijackthis log here.