Some of my System font setting seem to have been reset to old fonts like Arial and one of the older Mac fonts. Previously, I think, it was Segoe. This is not something I deliberately changed. I think it might have happened as I tried to solve a Microsoft Office uninstall problem with a rather brutal deletion of Registry keys.
SFC /Scannow and Windows repair did not solve the problem.
Is there anything I can do, short of re-installing Windows?
Example of what it looks like on my computer:
What it normally looks like. As you can see, it's a different font: