Are you familiar with Copying-and-pasting TTF fonts from C:\WINDOWS\Fonts to other folders? You should be careful: There are lots of fonts that are essential to your operating system and specific software programs. In case you've deleted some of the default fonts which should not be deleted. What's the result? Windows will misconfigure the default fonts you deleted. The font used to display specific text on the screen isn't the default as replaced by another.
