Number one among them is inability to enter certain areas such as tarant sewers and more importantly Black mountain mines. Let me tell you what happens.
Problem starts when I click on entrance to the area at that point game lags, almost freezes in fact cursor hardly moves and I can enter main menu only with great difficulty.
Map button turns blue as if I was about to enter world map and music appropriate for the area starts to play but thats it.
So far I have tried following: clean install with only UAP applied, previous with -doublebuffer and -no3D, UAP with hires patch and map fixes, all of this while running the exes as administrator and nothing.
Does anyone know what to do?