Victor,
I have no experience with Vipre. The simplest solution would be to just use another AV product such as AVG, which is very good.
This is another good argument however for a client/server or at least for running the datbase folder on an unused computer. Then you don't ever have to load AC nor do you have to use it.
How much RAM is Vipre using? Some AV solutions such as Trend Micro (at least the server version) have a real time check with runs in the background all the time. This can take up resources as well.
Why not purchase or build a small computer with a good Dual Core processor and 2 to 4 GBs of RAM and just let it run AC and any other key program/databases you have?
HTH
