I am flying Realflight 5.5. I have a new computer - a Cyberpower with a 6 core processor and AMD 6950 graphics card. The new computer brought a big improvement in graphics from my old XP system, but I have had some trouble with system stability. I was getting an occasional blue screen until I removed the the 3.5 custom airplanes. When I dumped the older EAs, I removed and reloaded Realflight and I have put the pieces back in one at a time. Everything ran well until last night when I got a couple of mouse freezes (cursor won't move - have to re-boot). I did 2 things last night in Realflight - I updated to the latest version of RealFlight (5.5.25) and I edited a custom airplane to make it bigger and faster than the EA. I want to charge these issues to Windoze 7 64 bit because I did not have any trouble on my old XP machine. What is the experience of the list regarding my problems?