I recently spent a few manhours on recovering a PC that contained a myriad of spyware, malware, trojans and al sorts of dark dirty warez.
Winfixer was one of the programs installed on it. When I took it back and told her not to bother with such "PC protection apps", she said she'd just subscribed to it. Subscription? For Spyware ? Eeesshh !
If you try to remove WinFix and are unable to do so, a system restore to a previous check point may work before you try doing something more drastic.
IMHO, I'd stay away from all these things (WinFix, WinChecker, Nuts and Bolts, and so on and so forth ** Im nto saying all these are spyware, but IMHO, they aren't needed).
You need three applications to look after your PC; antivirus, firewall and antispyware !
As long as you go for ones that other people have used and rate highly, like
Grisfoft AVG Free and
Zonelabs Zone Alarm and
Spybot Search & Destroy , you can't go wrong, especially if you keep them up to date and perform scans regularly, weekly at least.
To make things a little more water tight, why not try installing a secodnary spyware removal app for adhoc checks, like Adaware and Panda Active Scan.
So leave all the "we'll keep your PC in tip top order" programs alone, they only use up system resources or worse ! This is what i tell my customers.
Oh and scandisk and defrag every now and then will do no harm.