Interesting results...shall look at Comodo...see how it goes...
whatwhere ... I had NAV for years...until one day it disabled the MS BIT service....which actually necessitated the re-install of XP SP2, as every single lesser solution failed.
The BIT service is required by Windows Update. Without it you would have to seek out the updates manually, which is only fun for the true geek out there.
Bitdefender is a darn sight less of a pain than Norton EVER was.....