The RPC/DCOM exploit is a vulnerability that allows an attacker to gain access to the destination machine by
sending a malformed packet to the DCOM service. It uses the RPC TCP port 135.
You can disable the popup in Avast Network Shield provider.
Make sure you have ALL security patches/updates from Microsoft.
Use a firewall. Best is a router with hardware firewall.
This should be an infection on your network which is trying to spread on your pc. Avast is protection you from that. You can safely disable this notification as it is just annoying and the webshield will still block it…
Not sure why Avast has that message going on, it seems as though the DCOM exploit was fixed by M$ in 2003. http://forums.pcworld.co.nz/showthread.php?t=37750
There’s a download in the last post in that thread, which will give you a program that takes cares of other things that go along with the DCOM patch/exploit mess…