RPC & RPC problem

Please. ???

The creatersof this great program , must lost same time to resolve this bug. Please, I really don’t want uninstall avast 4, i love it.

But the rpc error has no logical. It hapens when i start the pc but not evrytimes.

I made a lot of tests and i can´t find a logical reason

Tellme what window services must be enable for the correct work of avast. ?

I have windows xp pro coorporate SP1 ???

I’m from Portugal, sorry my English