I played WOL for a long time on the maximum settings, and everything went smoothly.
I installed HOTS after I downloaded it (because the installer from the CD i bought got stuck all the time).
Now, i get a big number of stalls/min (displayed when i mouse over the menu at the bottom right above the actions), and the game freezes for about 30 seconds every about 30 seconds or less.
This is obviously unplayable.
How can I resolve this issue?