At first, disable the UAC (= User Account Control): Go to "Start", and click on your user avatar. Afterwards, click on the link to turn off the User Account Control. Restart.
Then, make sure to start the patcher etc. as an administrator, especially when the folder is located in C:\Program Files.
Regarding the issue with your video card: Go to setup.exe at first (start it as an administrator!), and try to change the resolution. If you are able to do that, your video card driver is installed, and DirectX is able to work with it. Sometimes, you just need to open setup.exe, and close it right afterwards, so the values get written into the Windows Registry, and you won't get another d3d error.