Untill now, avast was fully compatible with win98… but in last update, they seem to have rewritten the code of their program (cf vlk’s message in beta topic)
i finally managed to reinstall avast! (via setupfrepro.exe file) running my pc in “safe mode” (F8 at boot). The install completed, but the update doesn’t seem to work properly… I hope alwil team will find a solution… at least, i have recovered a protection even the vps will soon be too old… :-\