What active protection are people using and why?
For me it's...
AVG: Free, low overheads, easy updates, no conflicts, simple to use, has a scary virus alert picture.
SYGATE: Free, simple to use, gives good control & information.
WINPATROL: Free, simple to use, the barking dog.
Needless to say I have all the other anti-everything scanners but only the 3 above are active.