Had some problems with spyware lately and checked start up and found yfupp4c and cannot find any info on it. Running Xp. Ran Trend Micro online scan and it found

ADW.DEFUNK.C
Spyware_trak_msnspymonitor
Spyware_keyl_alogger.250
Troj_generic

The scan ran for over an hour trying to remove them so I shut it down. Have to try running Trend Micro in safe mode next. Ran Avast and found nothing...also ran adaware. Haven't run spybot yet.