When you upgraded from vista was it a clean install or did you lay the new over the old system.Its always best to do a full format and do a clean install, vista can reach up from your past and haunt you if you don't. Did you ever have problems running basic 6 on vista it works best on windows xp and the way around it is to install a virtual machine of windows xp and run it from there. Are you familar with VMware it works great there.