physx problem need help

[hash70]

hi while i was installing 10.4,i used driversweeper to get rid of the old ati drivers,but somehow i deleted the physx drivers aswell ,so now mafia2 wont start,i downloaded a physx driver from nivida website but when i try to run it i get a error saying it cant run because the msi file in steam is missing,how do i fix this,i tried to repair steam but that didnt work,need help thx

 

[Orcvader]

It's best not to use things like driver sweeper as it can delete a few important files. How did you try to repair steam? Uninstalling and reinstalling it?

 

[Final8y]

Use system restore back to the drivers before you used driversweeper.