Hello I have P3DV3.

when I am starting it I have the loading screen abd than it "coses" to desktop but I can it running in the task manager.

what can I do?
 

I had this happen a few weeks ago.  It was the same thing - I could see it running in task manager but I couldn't access the program.  I backed up my whole P3D file, re-installed, and put the whole file back and everything has been fine since then.

Isn't there something else to do?

The flight that the sim is trying to load my be corrupt.  Temporarily remove the files from your computer Documents folder.  I use v3 so mine are stored in C:\Users\simflight\Documents\Prepar3D v3 Files.  Yours maybe slightly different,

I removed the files from Prepar3D v3 Files folder and it still doesn't work

I tried that as well.    I also let it re-build the prepar3d.cfg file and everything else that I could think of.   Only the re-install worked for me.

Copy your .dll into a safe place and then delete it from it's original folder and see if it loads. I had the same problem after loading a supposed updated aircraft. If I the sim loads without a .dll something has corrupted your .dll, if thats the case you have the one you backed up and can add the entries one by one to see what messed it up.

If I understand the OP correctly, P3D does not load to the startup or setup screen.  Whenever P3D (or FSX) does not load to the setup screen, the problem is with your dll.xml (located in the same folder as your P3D.cfg).  You simply move the dll.xml to a temporary folder, restart P3D and see if this fixes the problem (it will).  This means you have a corrupted entry in your dll.xml and you have to find the one that is corrupted.  The AVSIM CTD Guide provides instructions on locating a corrupted entry in your dll.xml (see page 2)(link to the AVSIM CTD Guide is in my signature).

 

Best regards,

thank you vert much it worked

thank you vert much it worked

 

What worked? 

MBaclawski's answer : deleting the dll.xml file

I had exactly this problem (P3D was starting and then crashed before it opened) with P3Dv2.x after I installed very old sceneries from Aerosoft.

 

Looking into the "Eventviewer" I traced the culprit. Unfortunately I have forgotten the name of the file which P3D did not like and I did not keep a backup of this P3D version to have a look at it. I just remember that it was placed in a sub-directory like "VistaMare" in todays installation.

 

By the way, the problem was simply solved by just renaming that file and P3D started properly again.