AOL Active Virus Shield - stopped working

Disturbing Behaviour!
A friend is using AOL AVS with 98SE and just by chance noticed that while there was no indication from the tray icon or the AVS interface that anything was non-functional, EICAR.COM was not being detected as an email attachment, when written to / opened from the HDD, or when manually scanned. Uninstalling and re-installing brought everything back to normal.
Has anyone else heard of or seen anything like this with AVS, or KAV?

PS He’s not using Avast! Home because he thinks KAV has better detection - which may indeed be true - when it’s actually detecting!!

I will attest that AVS displays a notice both in its UI and in the form of a changed taskbar icon when its on-access module is turned off, at least for XP Home SP2.

No idea about Win98 though.

FYI, 98 GUI excerpt attached (I’ve not seen it in XP so I don’t know if it’s any different). That was the weird thing, the GUI said “File Anti-Virus : running” the whole time.

Asking again, does anybody know how to install AOL Active Virus Shield without the residents, only for on-demand scannings?