I have a 64-bit system and haven't problems. I have tried various methods of installing fonts and they all work. The easyest is opening the font and clicking the install button located at the top. There are some fonts that are not visible to all applications, off hand I can't think of the sprcific type. So it sounds to me that you are indeed able to install your fonts it's just that not all your programs can see or use them. If you like I will list the 3 font managers I happen to like and use, all are free versions or shareware.