Used it first on my present laptop...no change in ...

Used it first on my present laptop...no change in speed or performance for the better but it IS more slow now and keeps freezing up now. Found and fixed 4 infections supposedly. Second PC was so slow and loaded down with viruses we stopped using it a couple years ago so I was completely surprised that it found ZERO infections (took over 24 hrs) No improvement whatsoever. 3rd PC Has been non workable for over 3 years and will not boot up...After several tries got the FixMeStick to load and do a scan...It said NO infections found...duh! It still won't come on except to scan with FixMeStick. I guess it's 59.99 down the drain.