Get Help with File Explorer in Windows 10 – Fonts Issue
Try the following to Get Help with File Explorer in Windows 10 Font Issue
1. Open Control Panel, clicking Appearance and Personalization, and then clicking Fonts.
2. In the left pane, click Font settings.
3. Click Restore default font settings.
If the above doesn’t help then You may need to check if KB 3008956 installed or not. If it is not installed then you must get it via Windows Update to fix this issue.