Backdoor.Tidserv.I!inf

Win 7 Pro 32bit.  NIS 2010 is detecting Backdoor.Tidserv.I!inf in the following files:

 

C:\Windows\System32\drivers\RPCDD.SYS

 

&

 

C:\Windows\winsxs\x86_microsoft-windows-t..niportdisplaydriver_31bf3856ad364e35_6.1.7600.16385_none_d4b17a3e9f928d55\RPCDD.SYS

 

NIS unable to resolve the issue automatically and is asking for manual removal of the virus.  Can I delete these files manually or will this cause issues with windows operation?  And if I do delete the files what do I replace them with?  I cannot see a similar file on my windows installation disk nor one available for download from the internet.

 

 

I'm not very computer savvy so I hope the above makes sense.