Hi,
If System requirements are met then there shouldn't be any concern.
If we looked at the System requirements notes, here are the details
Hard disk
Windows: 850 MB free hard disk space for the installation; additional space is required for content and logs
Note: Space requirements are based on NTFS file systems.
Mac: 500 MB of available hard disk space for the installation
Reference: System Requirements for Symantec Endpoint Protection, Enterprise and Small Business Editions, and Network Access Control 12.1.2
http://www.symantec.com/docs/TECH195325