Most of the time, Windows Update does not install the specific drivers required for modern gaming.
DirectX 11 is included with Windows 10, but you might need to update it. For Feature Level 10.0 specifically, DirectX 11 should support it inherently. dx11 feature level 100 download windows 10 full
Before downloading any tool claiming to "add Feature Level 10.0," check your GPU model against the game's minimum system requirements. If your hardware meets the requirements, a clean driver install is the only fix you need. Most of the time, Windows Update does not
Older games coded for 10_0 may crash on 11_0 or 12_0. Use compatibility mode or the -dx10 flag if available. Most of the time
try to "spoof" feature levels via DLL replacements or registry hacks. That will crash your system or introduce malware.