Symantec Endpoint Protection (SEP) client cannot be installed to storage space drive.
Invalid installation directory:
The software cannot be installed to a storage space drive. Please select another installation path.
SEP 12.1 / 14.0
This issue is addressed in Symantec Endpoint Protection 14.0.1 MP2 (14 RU1 MP2). For information on how to obtain the latest build of Symantec Endpoint Protection, see Download the latest version of Symantec Endpoint Protection.