Fonts keep uninstalling

This is a long shot, I don't think that it is a Corel issue, but are any of you having problems with Windows 7, Corel x6 and fonts that won't stay installed? Right now I can't keep Times New Roman installed. It randomly deletes. It might be there for a day, or an hour or 10 minutes. I've also noticed this with Bodoni and Arial but to lesser extents. Right now Times New Roman shows up in Word and Corel, but not in Outlook. In outlook Times New Roman Bold Italic is substituted for normal

It might be a general Windows problem, but I can't find a solution and thought I'd ask here.