Flaps 40,
Just protect yourself as much as possible.
I run, adaware, spybot , Norton Antivirus and Zone Alarm all together, and no problems experienced at all.
I don't think adaware does anything until you select scan anyway.
Spybot seems a bit better in that it stops some spyware even installing while browsing.. It often warns Doubleclick blocked etc.
It appears that if you don't bother these days you will get multiple virus and spyware infections within minutes wherever you browse.
Barstewards indeed!