Perhaps you need to reinstall that font or something....
Try this first.......
Right click on desktop, click properties, go to the Appearence Tab and click Advanced.
Assuming this is all in jibberish, follow the picture i attatched below.
After you click on 'message box' there will be another drop down menu option (under where it says Desktop), those are fonts you can choose. Choose one, click ok on everything and see if there is a difference (you may need to restart computer)
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