MSRPC Server Service BO Threat

I've been getting popups every few minutes relating to MSRPC Server Service BO and is there any way to stop it?
As i've heard Symantec Endpoint Protection could help to stop the action however i have to remove my current Anti Virus Software.
Also i've searched across many webs and learn to know that this problem relates to 

Conficker Worm virus.

And that my Norton expires soon before the threats will be unprotected as i don't really have the time to head to a store and purchase a new Anti Virus Software and that even if i have done so the popup saying that a threat with high risk detected is still occuring. So is there anything i can do to stop this MSRPC Server Service BO rather than knowing that the threat appears every few minutes and i can do nothing to it?
Please provide me with some solutions or so.. Thank you so much.