I get this debugging error. Does anyone know what is causing this?
Sounds like it could be Visual Studio - that has a Just-In-Time debugger. There are instructions for disabling JIT debugging at http://msdn.microsoft.com/en-us/library/5hs4b7a6.aspx
If you're not sure, look in Add/Remove Programs to see if you've got it installed; or run Process Explorer (from SysInternals) to see if it's running.