Hello there! It sounds like your PC may be experiencing some trouble with its system fonts. Here are some steps you can try to fix the issue on your Windows 10 computer:
1. Restart your PC - Sometimes a simple restart can solve the issue.
2. Run the SFC (System File Checker) tool - The SFC tool will scan your system files for any issues and will fix them automatically. To run the SFC tool, click on the Start menu > Type in 'CMD' in the search box > Right-click on 'Command Prompt' and select 'Run as administrator' > Type in 'sfc /scannow' and press Enter > Wait for the process to complete.
3. Restore default font settings - If the fonts have been changed, restoring the default font settings may help. To do this, go to Start Menu > Type...