HoMM3 HD bug reports.

I downloaded Heroes 3 Complete, installed the HD mod on top of it. When launching and running the game, the first of the four processor cores is loaded to 100%. The other cores don't react at all. The core heats up to a maximum of 50 degrees, but the fan starts whining as if all four cores are loaded, although they are at zero. If Heroes is running in a window, opening any item in the top menu seems to remove focus from the game, and the core returns to normal. As soon as you refocus on the game, the core is immediately loaded to 100%. But switching between windows doesn't affect the game, and the core is loaded to 100% even when the game is minimized. The same situation occurs without windowed mode. The processor is an i5 3470. About four hours ago, I installed Heroes 3 SoD with HD mod 3.something (from heroes3tv), and everything worked perfectly. I reinstalled the OS, and the problem with Heroes 3 Complete and HD mod 4.++ remains. P.S. Without the HD mod, everything works perfectly; maybe this problem existed before, and someone solved it. I would be glad to know the details. Thank you in advance. Or maybe there is an older version of the HD mod (version 3.++), and I would like to try installing it on a clean Heroes 3 Complete. Added after 16 minutes I installed version 3.811 build 5, and everything works perfectly; the processor core doesn't overheat. Will I be able to play with other players using this mod on a newer HD mod? Added after 4 minutes The problem with the core starts when updating from version 3.811 build 5 to version 4.202 RC4 and in all subsequent updates.