Prepar3D will not start

[Kimo42]

Ok, I have followed yoke step by step instructions to get P3D v4.2 up and running again. I uninstalled the software for my saitek yoke and peddle, restarted my system to have it go back to the desktop. After entering the start up page, I clicked the start button and after the 100% loaded message P3D close and goes back to the desktop.
I have updated Windows, Logged in as Administrator, Checked Graphics card settings, Disable antivirus software, lowered the UAC, restarted my computer after each change and same as above, 100% then back to desktop.
I then deleted the generated files and Prepar3D CFG files, restarted my computer and started P3D. The startup screen comes up, I hit the start button, I get a 100% loaded and P3D goes back to the desktop.
I unplugged all my usb devices, except the mouse, same thing happen like above.
I checked that Microsoft Visuals, .Net Framework and Direct X were up to date, no luck.
Where do I go from here?
I have a windows 10 operating system, intel 4770 cpu, 16 gb of DDr3 memory, Asus 1050 graphic card, with PMDG 737, Aerosoft CRJ-700, AS16, My Traffic, Flightbeam, KIAD, KSFO, KDEN, FSdreamteam, KLAX, KLAS, KORD, REX4 Texture Direct, installed.
Where is the log file located? Is it a hidden file?
Thanks in Advance

[Poppet]

Hello Kimo42

Try these steps........

Launch Prepar3D from the Core Prepar3D v4 folder and test

Navigate to your Prepar3D core folder right click on the Prepar3D.exe and run as administrator

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Just to confirm, Have you run the Delete generated files command ?

Navigate to your core Prepar3D v4 folder, Scroll down a bit, Double left Click on the file Delete Generated files, A small black window will appear and then disappear again, this is normal

Then launch Prepar3D and test

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Have you tried running a repair on Prepar3D ?

Navigate to the windows Control Panel right click Prepar3D Academic \ Professional and click Change and click Repair

Then Restart your computer and test Prepar3D

Note: Insure you first disable your Antivirus Software, Your Firewall and the UAC (User Account Control)

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Also to eliminate a corrupt windows user Account........

Temporarily Create another Windows User Account with Admin privileges, Sign into this new account and then launch Prepar3D and test

Note: Don't use Special Characters in your Windows User name

Let us know how you get on