Check out this article to see if the suggestions fix this for you:
Also Windows update (KB3124200) apparently fixes this as well.
Have you updated to the most current version of 14. There was an issue with fonts in FM14 and Windows that was solved with updates.
Databuzz there were two different issues. The tmp issue is related to garbage text on layouts and the other issue is related to random square boxes that appear in the manage database screen, which the update fixed.
The most recent windows update has fixed this problem thanks.
I had the same issue, when I first install FM14 on Windows. I was happy to see the fix from FM.