Crossfire freezes at specific moments

After not using this PC for some time, Crossfire freezes during specific moments. When it does, it freezes permanently, untill I close it. I didn't have this problem befor.

When I'm joining a game it freezes, but for example it also freezes when I press "Item Shop", loading a replay, go in storage and press "character" or "Item".
Also, often, when starting Crossfire it runs normally, but then it keeps loading just befor the login screen.

I went to a site where I checked Crossfire system requirements and everything I got is better then the minimum and recommended requirements.

I already tried re-downloading Crossfire and re-installing the game.

Thanks!