I just tried to launch FS9 and got the "Microsoft Flight Simulator has encountered a problem and needs to close. We are sorry for the inconvenience" message. Why? I haven't changed anything...I think.

Find FS9.cfg file - mine is here: C:Documents and SettingsD BrownApplication DataMicrosoftFS9Right click over it and copy it where you are - this will make a copy of FS9.cfg named "Copy of fs9.CFG".Rerun FS9 and the sim will make a new one for u - may work may not.If it works and u have tweaked your orig FS9.cfg then u will have to do them to the new FS9.cfg file - if this works.If it doesn't work delete the FS9.cfg file u have just made and rename the cpy file back to FS9.cfgHave fun.

Didn't work - thanks for the reply though.

Hi, Try agian and if the same thing happens, click on the "click here" link and take a screen shot of that.Jimhttp://www.hifisim.com/Active Sky V6 Development Team Active Sky V6 Proud SupporterHiFi Beta TeamRadar Contact Supporter: http://www.jdtllc.com/AirSource Member: http://www.air-source.us/FSEconomy Member:http://www.fseconomy.com/

Here is a screenshot of the first screen that comes up and a shot of the information screen. Thanks in advance for any help you might be able to give me.

Hi,That ntdll.dll message is a real bugger even for MS. You may be better off reinstalling FS and re-patching it to 9.1.Jimhttp://www.hifisim.com/Active Sky V6 Development Team Active Sky V6 Proud SupporterHiFi Beta TeamRadar Contact Supporter: http://www.jdtllc.com/AirSource Member: http://www.air-source.us/FSEconomy Member:http://www.fseconomy.com/

That's what I was thinking, but before I do that, do you think it might be worth trying a system restore to go back a couple of days?

Hi,Try this again, but after creating the copy, DELETE the original fs9.cfg file. Then start FS9.Hope this helps,--Tom GibsonCal Classic Propliner Page: http://www.calclassic.comFreeflight Design Shop: http://www.freeflightdesign.comDrop by! ___x_x_(")_x_x___

Bizarrely, mine stopped working too. My problem seems to be something to do with Ground environment Pro. I get an error for terrain.dll. Interestingly, I found a report of someone with the same problem, and his was down to software running in the background - notably, D and o defragger. I checked to see what was running behind mine, and found a few. I disabled them and the problem, for the timebeing at least, seems fixed.

I found out the problem on my end. It turns out that it had to do with FS Passengers. For some reason it prevents FS9 from starting everytime I uninstall FS Passengers.