There isn't an option within UR, but you can change it in Windows:
1) Download and extract the attached file
2) Open ChangeWindowsDialogFont.zip in Notepad, change Tahoma to the name of the desired font, and save
3) Double-click ChangeWindowsDialogFont.reg file in Explorer, answer Yes to prompts
4) Restart Windows
https://www.sevenforums.com/tutorial...ts-change.html