What is sp rsser.exe is it an virus....?

This file is "Realtime Shield Service" and is part of a program called Crawler Spyware Terminator. I have seen no indication that it is a virus, but it seems to take up alot of unneeded system resources. I would advise against using this program simply because many free spyware removal tools are inadequate and some even plant viruses or other undesireable processes. If you need a free solution to adware and spyware try Spybot: Search and Destroy, millions swear by it and I myself will not run a computer without it.