Problem with eTrust Antivirus 7

Hello,

I have strange problem.
When I install this version of antivirus on Win98SE system runs very slow.
I have noticed that system behaves like this only when I do things which use
network. I.e. login to the domain, receiveng e-mail, network printing. When
I don't do anything like this system runs a little bit slower but it doesn't
seem to hang.
I did a test. I have disabled network card in the system, so network and
other services connected with network don't work. Everything was perfect.
Program and windows run very good. When I enabled network once again my
problems have started all over.
I also tried to check which eTrust service make all this and it seems that
Realtime Monitor is responsible. Problem is that I have installed all
available updates and it didn't help.
Did anyone of you have such problem?
If so how did you solve this?

Regards
Jerr