It is likely a server restart will fix this (the MHTS server is set to restart every 2 days) but in the meantime can you try the below option.

  • Click the Search / Magnifier glass and enter : Adjust the appearance
  • Click on the “Visual Effects” tab
  • Click on “Custom”
  • Ensure that the 2 checkboxes on the right side “Smooth Edges of screen Fonts” and “Use Drop Shadows for icon labels on the desktop” are selected.
  • Click “OK”
  • If this does not help then please wait for the server restart.