I've googled this, and may have a neat fix: While there may be some alternate roms out there that have this disabled (or at least non-functional), you can do the following that'll work on any windows box.
Create a batch file with these contents:
TASKKILL /F /IM "rpcnetp.exe"
TASKKILL /F /IM "rpcnet.exe"
TASKKILL /F /IM "upgrd.exe"
del "C:\Windows\System32\UPGRD.exe"
del "C:\Windows\System32\rpcnet.exe"
del "C:\Windows\System32\rpcnetp.exe"
del "C:\Windows\System32\rpcnetp.dll"
del "C:\Windows\System32\rpcnet.dll"
md "C:\Windows\System32\UPGRD.exe"
md "C:\Windows\System32\rpcnet.exe"
md "C:\Windows\System32\rpcnetp.exe"
md "C:\Windows\System32\rpcnetp.dll"
md "C:\Windows\System32\rpcnet.dll"
Run the batch file once. It stops the processes, it deletes the files (which normally come back at reboot), it creates folders named the same as the files.
The files can't come back, because you can't create a file if there is a folder of the same name. And it stays like that, because the offending code that creates the files is usually not smart enough to realise it's a rougue folder that's preventing the file creation.
Let me know if it works.