White screen (menu, in-game)

Hello, Ive happened to encounter a problem: game menu is completely blank, although it seems to work (Im able to start or quit the game).
My PC specs do match minimum system requirements, plus I`ve installed the game correctly.

Any ideas? Thanks in advance.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.