Hello,
Here is an Article for you to follow on:
Steps to prepare computers to install Symantec Endpoint Protection 12.1 client
The Article states,
Prepare Windows Vista, Windows Server 2008, or Windows 7 computers:
Windows User Access Control blocks local administrative accounts from remotely accessing remote administrative shares such as C$ and Admin$. Perform the following tasks:
■ Disable the File Sharing Wizard.
■ Enable network discovery by using the Network and Sharing Center.
■ Enable the built-in administrator account and assign a password to the account.
■ Verify that the account has administrator privileges.
Hope that helps you!!