Copied Arial.ttf to the font folder and soft reset... still can't delete the icon font that it used before, but now it uses Arial font in cube and comm manager, so problem (partially) fixed!
Easiest fix is to:
Use Total Commander to rename the fonts. Then move the fonts to the Windows directory, not Windows\fonts. Soft-Reset.
I know it's been a few days since you posted this DogGuy but thanks. Renaming and/or deleting/moving the fonts in \fonts folder worked great. Now I have my basic tahoma font for the entire system.