Kaspersky endpoint security 10 blocked network attack.

OK so one of are computers used for shipping keeps getting attacked, the notifications is...

Notifications:
Critical event: 11/14/2013 12:28:18 PM:
Event type: Network attack detected
Application\Name: Unknown
Component: Network Attack Blocker
Result\Description: Blocked
Result\Name: Intrusion.Win.DCOM.exploit
Object: TCP from to local port 135
Object\Type: Network packet
Object\Name: TCP from to local port 135

i know its being blocked and i should have nothing to worry about and just let Kaspersky do its thing but i would just like to know if theirs a way stop it or what the attack even is?

Thanks!