I am using Norton Anti-virus. So far, I have had no problems with Norton interfering with any of my games.
There's always a first time -- especially with Norton doing heuristic scanning. You could try disconnecting from the Internet and temporarily turning off real-time scanning in Norton and see if it makes a difference. Be sure to turn real-time scanning back on after testing the game and before you reconnect to the Internet.
Can you run dxdiag and find the date of your video drivers?
Start button --> type dxdiag in the Start search and OK it --> check the Display tab and look for the date of the drivers on the right side of the pane. Also what is the "Name:" of the video card (on the left side of the pane).
Did you try running with compatibility mode set to Windows XP or Windows 2000?
Return to Ravenhearst is my favorite of the series and I hope you can get it to run.