Taking a look on the knowledge base their was a similar reported issue:
If that sounds similar to you machine set up then i would recommend as stated here Upgrading to version 11 of Symantec End Point Protection resolved the issue.
If that does not sound like your machine then either try:
1. checking to see if you graphics card is up to date: start menu>> type in RX >> open your version of the RX tool >> go to the diagnostics tab >> if your graphics card is out of date then update and reconfirm behaviour.
2. a registry re-set may be an option:
close SOLIDWORKS and go to the Registry Editor (type regedit into start menu) and rename the following key: -
HKEY_CURRENT_USER > Software > SolidWorks
I normally right mouse click on the SolidWorks folder, select rename and rename it as an old registry with date i did it, something like this: - "SolidWorks_Old_DD.MM.YY"
I hope that helps