anss123: I have the game running fine under Vista. One thing to try though is to change the sound card type the game uses.
Guide:
1. Open up the start menu and search for Notepad
2. Right click on notepad and open it as administrator
3. Navigate to C:\Program Files (x86)\GOG.com\Heroes Of Might And Magic
4. Open the file dosboxHOMM1.conf
5. Scroll down to the bottom and put a # in front of the line "loadfix -4 heroes.exe"
6. Write "Setup" on its own line bellow loadfix
7. Save the config file but do not close notepad yet
8. Start the game using the normal short cut.
9. Press 1 - 8 - 3 - 4
10. Remove the "Setup" and # from notepad and save and close
11. Try the game
If it does not work you can always experiment. Try using GUS for instance.
That appears to have done the trick. Thank you very much kind sir!
Again, this place is fabulous.