Sorry your first post had to be in support forum. 
Welcome to the forums.
I see you say you are running Dx9.0
Please first upgrade to 9.0c
(Either by itself or if you install Service pack2 the latest DX is included in it.)
and see if the new problem of the 5 -10 min into the game crash occurs.
Then if that does not solve all your troubles, tell me if one or both still occur and:
Please run a DirectX Diagnostic:
Start menu –Run - then type Dxdiag, then select each tab across the top of the window, and run the tests on each tab. Then select “Save All Information” button in the lower right of the window. This will bring up a dialog box to allow you to select a name for the file where the information will be saved. You can save it right on the desktop as this will make it easy to find. Then copy the contents of that file from the start to the heading that says “DirectX components” then paste what you have copied into a post in this thread.
Welcome to the forums.
I see you say you are running Dx9.0
Please first upgrade to 9.0c
(Either by itself or if you install Service pack2 the latest DX is included in it.)
and see if the new problem of the 5 -10 min into the game crash occurs.
Then if that does not solve all your troubles, tell me if one or both still occur and:
Please run a DirectX Diagnostic:
Start menu –Run - then type Dxdiag, then select each tab across the top of the window, and run the tests on each tab. Then select “Save All Information” button in the lower right of the window. This will bring up a dialog box to allow you to select a name for the file where the information will be saved. You can save it right on the desktop as this will make it easy to find. Then copy the contents of that file from the start to the heading that says “DirectX components” then paste what you have copied into a post in this thread.