New SBS2008 - cannot install program on WinXP 32 bit system from shared folder

SBS2008 (just loading clients on new system)
Shared folder -> everyone full control

WinXP SP3 32 bit
First setup as standard user
Trying to install Symantec endpoint protection 32 bit package
Installer launches then I get -> "This version of Symantec Endpoint
Protection requires elevated privileges in order to install. Please login as
administrator"

I changed to network administrator and re-ran with same result.

Is there something else I must do to install a program from a server shared
folder?

THX

I will work the kinks out on this first client before installing the
remainder of WinXP & Vista clients (<10).


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John Lenz