What do you mean by "Font is being deleted" Neil? It is a Windows 7 system font.
I don't have any fonts added to the skin at all in the fonts area in SKS 10. No need to if the font is a system font, and besides, if you add a font to a skin and later decide you don't want that skin any more and delete it in WB, the skins folder still remains in the Windowblinds directory, because of the fonts. Only way to delete the folder is to reboot and then manually delete it.
That is why I do not add unnecessary fonts to a skin.