My computer crashed and now my driver is gone?

I was playing homeworld and played with an infinite units mod(allows me to spawn as much units as i want). I spawned in too much at once and my computer crashed and gave me a blue screen and restarted. When i came back my computer performance lowered drastically. I looked into my devices and noticed that my NVIDIA driver wasn't there anymore. It was a 860M and i have a lenovo. What happened and how do i fix this?

Added (1). Tried the system restore.
Still can't recover it

That's very weird since homeworld doesn't really need over the top PC specs to be able to play it. That said, I would perform a system restore to see if you can recover the graphics driver (not guaranteed)

Honestly, I would just reinstall the graphics driver if worse comes to worst.

Use iobit driver downloader