Help request: after registering, resident protection refuses to work

Well, just as the thread title states. I registered my key and some time later I realize that the on access protection has stopped working. I can’t access the virus chest either.

I have Avast 4.8.

The Avast tray icon had disappeared, but following advice I ran ashdisp.exe and got it to show up. But now it has a red mark on it and it’s giving me a RPC error.

Could anyone provide some insights on this issue?

well i would first recommend updating to new version Avast 5. http://www.avast.com/index

What was the previous AV, how was it removed?

RPC error is usually a result of AV remnants…

http://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=46

Thank you for the replies, and sorry about the delayed reply.
I’d rather not update just yet.
And regarding previous installations, no. This is the first AV installation I’ve done in this machine, and until a few days ago it was working alright.

Did you try what the link given by spg SCOTT suggested ???

Greetz, Red.