Been using avast! for quite sometime now, got rid of NAV finally.
After working fine for few months, the 'a' icon suddenly disappeared from the tray. I reinstalled avast! and everything was ok. I don't remember what I did or happened that caused this disappearance. Just three days back, I was trying to change the paging file size and was rebooting the system repeatedly to see the effect. What I noticed was that after third or fourth reboot the 'a' icon vanished from the tray. I thought the systray.exe was playing a trick, and the AV was working well. On a hunch, I executed the EICAR (antivirus testing file having a fake virus), and found no virus warning. This alarmed me, as I for the first time realized that not just the tray icon, but the resident protection was gone. I went to the avast! folder (in Program Files) and executed the ashdisp.exe (again on a hunch) and voila! the tray icon reappeared, rotating happily

. But subsequent reboots showed that the tray icon wasn't reappearing automatically (had to use ashdisp.exe again and again). So I decided the earlier cure, i.e. reinstallation of the AV. It worked this time too, but I am worried. There is something that turns off the resident protection apparently easily. Maybe it was my tampering with the paging file (but its unlikely).
To cut the long story short, the resident protection shouldn't fail so easily.
I'm using XP (with sp1) on a P4 1.7mhz, 256 RAM, zonealarm as the eternal resident program, webshots is the other resident program, firefox is my browser (don't remember when I last used MSIE), also using AdAware & spywareblaster & spybot:Search-n-Destry as spyware protection, none of these three is resident however. And yes, I am using the latest of avast! home edition 4.5.--- with latest virus updates.
ps: just a thought, why is one of the files named 'jollyroger...'?