For a good free anti-spyware program with resident protection I recommend Microsoft Antispyware Beta, but I don't want everyone using it 'cause if everyone did hackers & malware thugs would concentrate their attacks against it.
I believe avast! & ZoneAlarm are the best in their trade, but I'm glad people are using a variety of others to keep the thugs busy.
It is good you're trying out new programs.
I hope I'm breaking rules using "thugs".
Thug From Wikipedia, the free encyclopedia.
Thug - derived from Thuggee. Generally taken to mean a ruffian, a miscreant, a person who behaves in an aggressive manner towards others.
Malware makers fit this description as they are aggressive towards our computers.