+multimedia freeze

Please help! I am not on the computer I am having problems with so the information I give will be somewhat vague. I hope you can still help. I run our church multimedia system. I use a Dell 2.4 ghz with a Pentium IV. The computer came in a bundle with dual monitors, and a projector for church multimedia. It came from a place called Fowler Productions. It is supposed to have all of the necessary video and graphics cards and I believe it does. I run a worship program called SongShow Plus. We run several video backgrounds i.e. Digital Juice. This software used to run really smooth. It now seems to have been attacked by a worm or virus or something. I installed Norton's latest version of internet protection and it will not even open. I have run Spy Sweeper and System Mechanix and they don't seem to be able to find any spy/adware. I use BellSouth internet service and Explorer browser can't ever seem to connect right. My internet connection is almost non-existant now. The SongShow Plus is really hard to open now. It says something about RPC server can't be found. The techies at Fowler don't know what is causing it. They sent me a new version of the software and I reinstalled and still have the same problem. I am at my wits end. I am about ready to wipe everything clean and start over. The only thing is I don't know how. My cell number is

Thanks,
Joe

I edited out your cell phone number, please don't post it.. I'm also moving this to the Security forum where someone can help you ....