Hello.I have solved the problem.
1: Put your DVD of HOMM 4 in the DVD reader.
2: If install menu will pop up close it.
3: Go to My Computer and Right-Click on the drive where is HOMM 4
4: Go to folder UK.Then if you want to install it (HoMM4:_setup , HoMM4GS:H4GS , HoMM4WoW:H4WW.)
5: Then go in one of folders shown up /\
6: Then right-click on Setup.exe , then click on (whats under the open?)
7: And uncheck the mark.Then click ok and it should start.
8: Enjoy the game.
Sources:Figuring out myself.
AND PLEASE REPLY IF I HELPED.
And if u dont like it.Then say it and I will delete it.:sigh: