Hi,
Thank you for posting your query on Symantec community.
For Windows operating systems, you must uninstall Symantec Endpoint Protection before you upgrade the operating system. This applies to all operating systems and all versions of Symantec Endpoint Protection (client and management server), with one exception i.e. upgrade to the Windows 10. Otherwise, Symantec Endpoint Protection does not support in-place migration due to potential issues which may arise during the upgrade.