I recently purchased my copy of MA at gencon INDY and have started to play it. I have been having a very common problem with my copy.

I have been playing #3 and 4 of the Iceworld campaign and when I do I often get the problem with all or some of the following effects: The computer skips his turn, any menu options or pop up do not show up but are there and able to be clicked on if u blindly click, unable to invade movement does not give u the option of attacking enemy territory, random reinforment phases (lets me reinforce territoties I was previously unable to reinforce when playing same scenario)

Whenever I get these problems I have to restart the whole game since I tried to play through them and it doesnt work. Its very frustrating for a new owner of a game to get it home and find it all buggy....

If anyone knows why this happens or ways to fix it let me know please...

Did you try install patch 191?
It should fix problem with Campaigns.