To fix
Windows 10 not detecting graphic cards, you can use the steps below and see if it works.
Enable graphics card
1. Open the Power Menue with the Win+X key.
2. Click on device manager, and expand display adapters.
3. Locate your graphic right-click on it and choose Disable.
4. Right-click on it again, and select enable.
After following the above steps restart your PC and check if your problem has been resolved.