As Didier says, if you have not installed SketchUp correctly all kinds of unexpected file & folder permission issues can appear... To repeat what has been stated in many places before... To fix your installation... Login to Windows as your normal user-account [NOT the specialized administrator account - BUT if your normal user has some admin-powers that is OK] Ensure SketchUp is closed. Find the SketchUp installer's exe file - usually in your Downloads folder. Select its icon, right-click > context-menu > "Run as administrator" When prompted choose "Repair". When it completes retry SketchUp and see if these kinds of issues are improved...