I'm indeed surprised that even after formatting you got so many entries in spyware programs.
What's coming to my mind as an answer goes something like this:
Windows makes about 6 copies of ur registry internally....just in case one needs to revert back to last good registry backup.
Coming to ur question....I guess u have atleast 2 partitions on ur hard-disk...in which case while u formatted ur "C-Drive".....the main registry didn't got erased like it should have done on formatting a drive....that's bcoz it has info about the second partition also & windows couldn't delete the main registry.
So when u reinstalled ...... the 2nd copy of the registry backup comes back into picture & since it already has known spywares .... u got the entries found by ur spyware programs.
Further, how good is anti-spyware ??? Well I found it pretty useful though in conjunction with atleast one other spyware program alongwith ofcourse updated anti-virus software.
My best pick among all available spyware detectors is SPYBOT+SPYWARE BLASTER & MS ANTISPYWARE.
What's good with antispyware is its easy to understand msgs which as always for most MS products makes it pretty user-friendly. Besides, new definitions keep coming in pretty often....something I really miss in spybot which gets some updates once in a blue moon. Also, it takes less resources from system while working quitely in background.
Giving one very important word "BETA" in its name perhaps this much of leeway can be given to MS Antispyware.
I just hope this BETA tag goes away real soon & a complete product comes up pretty soon ....hopefully FREE too.
My computor was recently bitten by an unknown virus even though I had Norton's antivirus and firewall. So taking drastic measures I formated my Hard drive and reloaded all my software, connected to the internet and reloaded all the latest virus definitions plus Ad-Aware SE, Spybot S&D and the New Micrsoft Antispyware.
Now bearing in mind the only time stent on the net was re-registering all my software and downloading the latest updates, I should have a klean machine.
I then put the three antispyware packages to the test.
Here's the score. AdAware found 44, Spybot found 10 and Microsofts found a big fat zero. Fills you with confidence dose'nt it