I am not sure if you should do that or not I do not think it will hurt to uninstall the 2005 stuff cause FSX is going to install one version and FSDT the other version. At the very least install your FSDT scenery first and test it out to be sure it works before you go to the hassle of installing all the other stuff. Just use the bell helicopter to test it.

Uninstalled FSX, I simply back up everything that was left in the folder. I reinstalled FSX. FSX worked perfectly fine after it. Then I installed all my FSDT airports. And guess what? They all work great without any crashes!Now I want to prevent this from happening again, but I have no idea what has caused this exactly.

Once you've got everything installed, adjusted & working properly I would definitely make a backup. That way if it ever messes up you can just restore it & save a lot of heartache.

Once you've got everything installed, adjusted & working properly I would definitely make a backup. That way if it ever messes up you can just restore it & save a lot of heartache.

After uninstalling FSX, I back up what was left in the FSX folder. I reinstalled FSX along with all my FSDT sceneries and everything works fine again. Have you any idea how to prevent his in the future? For example cancling all applications that are trying to install any version of the Redistributables (especially older programs like PMDG 747X)?

That I can't answer. It appears that installing multiple versions is ok since you had more than one 2005?On the backup, make sure it covers the system as well, so if you restore FSX to a previos time, the registry matches it.

Just don't uninstall any C++ Runtimes. Best way to keep safe is to have system restore enabled on all drives. That is what I do, if one of my sceneries screws FSX up I do a system restore with the most recent save.

Just don't uninstall any C++ Runtimes. Best way to keep safe is to have system restore enabled on all drives. That is what I do, if one of my sceneries screws FSX up I do a system restore with the most recent save.

Good solution. But system restore has some a lot of annoying disadvantages though, for me at least. It eats a LOT of disk space everytime I install something or defrag my HDD.

Good solution. But system restore has some a lot of annoying disadvantages though, for me at least. It eats a LOT of disk space everytime I install something or defrag my HDD.

Yeah I know about those problems and I have a solution. Here is how I maintain my system every monthSystem restore is on with all 3 of my hard drives enabled.Twice a month I do maintenance.Before I get ready to do maintenance I confirm everything is running smoothly first. Then I go into System Restore and uncheck all the Drives which basically clears all the restore saves and you gain a bunch of hard drive space back. This also allows Defrag to run much faster since restore is off.Once system restore is disabled I run Registry Mechanic and Fix any Errors with the Registry, Clean the Discs (Temp Files) and Defrag the Registry.Next I Defrag all my drives.I finish up with checking all the drives again in System Restore and do a manual save.This way way you can have the best of both worlds without system restore eating up all your hard drive space because it only keeps a max of 2 weeks of restores. Most importantly you will have restore available in the event that something goes wrong. This is a life saver cause everyone knows how long it takes to do a format and reinstall everything. I have had a few sceneries screw me up over the past year (easily fixed with restore) but I have not had to do a format or reinstall for the past 2 years.

turn your auto gen down a notch and try it

Yeah I know about those problems and I have a solution. Here is how I maintain my system every monthSystem restore is on with all 3 of my hard drives enabled.Twice a month I do maintenance.Before I get ready to do maintenance I confirm everything is running smoothly first. Then I go into System Restore and uncheck all the Drives which basically clears all the restore saves and you gain a bunch of hard drive space back. This also allows Defrag to run much faster since restore is off.Once system restore is disabled I run Registry Mechanic and Fix any Errors with the Registry, Clean the Discs (Temp Files) and Defrag the Registry.Next I Defrag all my drives.I finish up with checking all the drives again in System Restore and do a manual save.This way way you can have the best of both worlds without system restore eating up all your hard drive space because it only keeps a max of 2 weeks of restores. Most importantly you will have restore available in the event that something goes wrong. This is a life saver cause everyone knows how long it takes to do a format and reinstall everything. I have had a few sceneries screw me up over the past year (easily fixed with restore) but I have not had to do a format or reinstall for the past 2 years.

So if I understand correctly, you make a manual save each time after defragging. But every new save eats up HDD space, so you also delete the older system restore points first, correct? Then you make a new one manually right? And apart from when you defrag, system restore is always on, correct?

So if I understand correctly, you make a manual save each time after defragging. But every new save eats up HDD space, so you also delete the older system restore points first, correct? Then you make a new one manually right?And apart from when you defrag, system restore is always on, correct?

When you disable System restore by unchecking your drives all system restore points are automatically deleted. After making a manual save from that time on until the next maintenance in 2 weeks windows will save additional restore points automatically when installing updates or you install new software etc etc. This should not be a big problem unless you are way low on space. If you are then its time to consider getting a bigger hard drive.All I have is 3 250 gig western digital 250 gig second gen sata drives. Windows is on C: Programs on D: and FSX on E: and I still got plenty of plenty of space left over.