My up to date PANDA didn't stop the KLEZ from slivering into my machine and sending out suspicious files to everyone on my address book - soon others were sending me worm messages - Bettie at RGE wormed me a message "check out my new game (insidious), etc.

Anyway, my questions are -

whtas the best anti-virus?

when a infected file is discovered and cannot be deleted, why is it renamed?

once renamed, is it still functional?

if it is 'quarantined' is it still functional?

thnaks in advance! zg