Summoned undeads cause freezing the game

Azureknight

Hi, undeads I summon with my Animate dead spell seems to cause gamefreezing

1. I load a game (Wale of Shadows now, but the same thing happens in Kresselack's Tomb, for example)
2. Cast Animate dead spell with my cleric
3. Game freezes, after few seconds or few minutes, but always when my summoned zombies/skeletons are on the screen. No Alt+Tab, no Crtl+Alt+Del, only thing I can do in that case is hard restart.

I play Heart of Fury mode, so playing without summoned undeads is nearly impossible

I would attached dump file, but since game do not crash actually, no dump file is created during the process

Tech notes:
Intel(R) Core(TM) i3 CPU, 2,4 GHz, 4 GB RAM
Intel(R) HD Graphics (Core I3) (Lates drivers)
Windows 7, 64 bit

Thanks

Mathsorcerer

Do you have any mods installed? Do the undead get summoned and show up before the game freezes?

Azureknight

Undeads get summoned and I can control them, shortly. Sometimes game freezes after minute or so. Sometimes (rarely) summons die before anything go wrong.

I have steam version of IWD:EE, no mods or additions installed, except latest patch.