That's it I managed to start P3D, it was a problem related to my displays in multiple screens: When starting the screen was immediately reduced in the taskbar and no action with the right click could activate the window. My solution: - Task Manager - Right click on Prepar3D exe then expand - Right C...

Thank you Dan, that's exactly it. I used a Windows tool to install / uninstall a program and it worked. https://support.microsoft.com/en-us/help/17588/windows-fix-problems-that-block-programs-being-installed-or-removed So I was able to reinstall Client Update 4.5.12.30293 successfully. Now I have an...

Hello Before installing Client Update 4.5.12.30293 I want to uninstall Prepar3D v4 Academic Client with Control Panel / Uninstall a program. But the uninstall does not work by staying forever on the window http://www.pilote-virtuel.com/img/members/10362/Uninstall-P3D-v4--Client.PNG Warning !!! In \\...

Hello nicko Well done!

I added: Load Virtual Reality = 0
AND also updated Nvidia driver in 425.31

Thanks to All

I have exactly the same problem: upgrade v4.3 to v4.5
1 - The uninstallation of v4.3 went wrong: blocking
2 - Installation of v4.5 with success
P3D opens a window for 1 second and then disappears
But P3D is present in Task manager.

Thank you for helping us