Solved: Help! MS Word won't see my fonts

I have a problem which I think may be the result of removing some software applications from my pc on 1st January (long overdue tidy up).

MS Word doesn't seem to be able to access the fonts on my computer.

If I open a new document, Word seems to open normally, but if I try to select a different font, it doesn't show the fonts that I know are available on my pc (see attached gif file).

All other applications seem to work normally, except for Powerpoint which has a similar issue.

Some of my existing documents, when opened, won't display the correct font. Others do, but I suspect that these documents are based on templates other than Normal.dot.

I've checked out Normal.dot, and it doesn't seem to be corrupted.

Any ideas?