Adobe Distiller Error: invalidfont;

Problem;
When trying to convert pages to .PDF's the following error was displayed;

%[ ProductName: Distiller ]%%
66xtcje not found, using Courier.
%%[ Error: invalidfont; OffendingCommand: xshow ]%%
Stack:
[100 100 99 100 40 89 40 110 95 100 48 88 91 88 74 0]
(
)

%%[ Flushing: rest of job (to end-of-file) will be ignored ]%%
%%[ Warning: PostScript error. No PDF file produced. ] %%


Solution;
Restored Windows 7 Default font settings by;

1. Open Fonts by clicking Start button, clicking Control Panel, clicking appearance and Personlization, and then clicking fonts
2. In the left pane, click Font settings
3. Click Restore default font settings