When flying for about 5 hours straight my screen goes completely black, the sim is still running and the plane sounds are still there but I have no visual on the aircraft or it's systems. It's not a problem I have come across with FSX before but I got really annoyed when it happened. If anyone knows of this problem and or a solution to this it would be appreciated if you could get back to me. Thanks. ----Shamrock727----

If you're using Windows 7 - do a search in the CTD forum, for "UIAtomationCore.dll": read up on it, as this is certainly one of the causes. You might find more on it here, too.

Yes I am using Windows 7 Ultimate 64 bit. I have found the file "UIAtomationCore.dll" and the tutorial on how to delete It, but I cant delete It until I take owner-ship of the file, How can I do that?

I try not to use the menu late in long flights because that's when I get balck screens. Early on it's ok but later when I need to look at the map for the ILS for instance, bam.

Here is a good MS Technet discussion on the issue and the fix, along with a more severe fix at the end:- http://social.technet.microsoft.com/Forums/en-US/w7itproappcompat/thread/fb1808ff-92f0-478b-9826-f2ed6fbeae97 At this point I would not delete any of the .dll in the system folders: I've found it sufficient just to drop in the 6.0.5840.16386 version of the file - get it here: http://www.search-dll.com/dll-files/download/uiautomationcore.dll.html and then register the dll in the registry while you're in the root FSX folder. Hold Shift and right click, Select "Open command window here" from the list of options, then copy/paste this:- regsvr32 UIAutomationCore.dll FSX should then use this version rather than either of the OS system folder versions, so there should be no need to delete them.

You don't need to delete the original files. Just put that downloaded one in the FSX root folder. I was so thankful when I found that solution months ago because FSX was unusable for me without a fix.

I have put the downloaded file in the FSX root folder. Hopefully It will all be ok now! Thanks for your help guy's

Here is a good MS Technet discussion on the issue and the fix, along with a more severe fix at the end:- http://social.techne...26-f2ed6fbeae97 At this point I would not delete any of the .dll in the system folders: I've found it sufficient just to drop in the 6.0.5840.16386 version of the file - get it here: http://www.search-dl...oncore.dll.html and then register the dll in the registry while you're in the root FSX folder. Hold Shift and right click, Select "Open command window here" from the list of options, then copy/paste this:- regsvr32 UIAutomationCore.dll FSX should then use this version rather than either of the OS system folder versions, so there should be no need to delete them.

Just wanted to say Thank You for this HU. I too was having an issue which proved so maddening that well into a long flight,all of a sudden the sim went 'black screen' yet the sounds were still therein the background.Ok,I could recover the flight via FSUPIC but would have to go through all that FMC programming once more,and in most cases just abandoned and called it a waste of time. Now, I did have that UIAutomationCore.dll where it should have been but as per a previous post I saw elsewhere,could not quite register it. Now with that syntax you included with your HU,I was able to register it----no more lock-ups,so thanks.

You're Welcome., Rick! Glad you got it fixed!