winrpc.exe is a known malware utility. This file, and possibly others, are running in the background on your system. Deleting these files immediately is very important.

winrpc and it's associated process, Trojan.W32.Spybot, are known to be a type of malware. Adware and malware can be very tricky. Malware creators know their files will be removed if found, so they sometimes give the files names that are similar to known essential files.

To be sure that you are not removing essential files, use Computer Associates's free scan of your system.

With winrpc.exe already on your system, there's probably more spyware or adware you haven't discovered. Get a free scan of your system.