This has been doing my head in for so many since the last update.
After trying to install the latest patch, an error occurred stating:
"Could Not Load Direct3D"
After reading so many posts and shizzle about trying to find a solution. Doing updates on everything blah blah blah, None of them helped me at all, until I found something myself lol.
Whether it's to do with a certain update or whatever...
Try out the following:
1. Click Start.
2. Click Run.
3. Type - Dxdiag.
4. Click "Display".
5. You will see "DirectX Features" ensure that this is enabled and the other tabs.
6. Run the tests to ensure all is sweeet.
7. Reload LOL and the patch and everything else should work!
I have not seen anyone give this as an answer, so try it out and I wish you all the best.