If that doesn't work, try uninstalling and reinstalling SketchUp. This can fix any application files that were corrupted (this doesn't affect or fix your SketchUp drawing files, the SKP files). When asked if you'd like to remove SketchUp, click Yes.

To uninstall SketchUp, select Uninstall.Click the Start (Windows logo) menu > Control Panel > Programs > Programs and Features > SketchUp #.(If you have more than one instance of SketchUp open, make sure you quit all instances of SketchUp.) Open SketchUp, click the License tab in the Welcome Window, then click the Remove License button. If you are uninstalling SketchUp permanently from your computer, be sure to remove your license first.