I have purchased a new computer. My old computer was running Windows XP (32 bit). My new computer has Windows 7, 64 bit. I have FSX with sp2. My video card is GTS 250, the processor is I7-930. When I select the C400, it hangs FSX. The Windows "blue circle" continues to rotate round and round. I notice the Garmin GNS 430 display panel remains blank. I have to select the Task Manager to stop FSX.I have reinstalled about 3 times with same results. I have several other complex aircraft loaded and working OK. Just the C400 is a problem. Has anyone else have this working with Windows 7, 64 bit? Any ideas?Thanks,jim

Here's a shot in the dark:Tried turning UAC off?

Where did you install FSX ?Most simmers now agree that it should NOT be installed under the default Program Files path but rather to a new folder outside of Program Files - i.e. C:\FSGames (as an example).If your problem is "security" related, having the installation outside of Program Files will likely help.

Problem Solved. Thank you Ryanbatcund for suggesting turning off UAC. I set the slider from the default position to "never notify" and now the plane loads correctly! I would have though Microsoft would have given me a message that UAC was interfering with the C400. But instead, it just caused FSX to hang!Thanks again,Jim