If you have System Mechanic installed, search the Iolo knowledge base with the keyword fonts.
Otherwise, courtesy of
here, the following seems to work:
"Ok Here is the fix. You will need to edit the registry. With this being said I will not take responsibility if you screw up.
1) Start Button.
2) Run type regedit.
3) Goto HKEY Local Machine.
4) Goto Software.
5) Goto Current Version.
6) See if you have a Fonts folder. If not then we will create a new key.
7) Right Click on "Current Version" on the same folder as (step5).
8) Select New Key.
9) Load all the fonts back in the control panel Fonts folder (from another machine).
10) Reboot."