as you also have located this thread.http://www.bleepingcomputer.com/forums/t/141245/what-happened-to-winpfind35uexe/
lets try and help you individually
please tell us what YOUR windows version is, what your antivirus program is what other protection program you have on board, when last fully updated and run on full computer scans; which if any have flagged up an infection?
you may perhaps not appreciate the fact that( like a human being )each and every computer is unique
; when you treat a human being for an infection you treat that individual
with specific 'treatments' for the presenting infections
same with a computer ; it needs to be treated as an 'individual computer' and approached accordingly