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Crashes upon device creation

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I have a problem with creating a D3D11 device. On one computer which has long been not formatted (probably a lot of libs and stuff like that installed) my app works fine. On another computer, which is a clean Win7 x64 installation, I compiled my app and it crashes upon device creation, that is, D3D11CreateDevice returns a null pointer to the device. I've already updated my Windows with various updates etc. but that has not helped. Any idea?

 

I remember I had the same problem on another computer when I tried to create the device with D3D11_CREATE_DEVICE_DEBUG flag. Without this flag it was all fine. But now it crashes no matter whether this flag is on or off.

 

[EDIT]

I've just updated Windows 8 SDK and the device creation process goes fine. Now, when I try to run my app via F5 key (Debug mode) it crashes upon swap chain creation. But, when I run the build with DEBUG -> Graphics -> Start Diagnostics (Alt + F5) everything is fine. Any idea why "regular" F5 doesn't work?

Edited by maxest

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