What are the main reasons for installing WSS 3.0 and Microsoft Office Sharepoint Server 2007 using a dedicated setup account rather than local admin or a non-shared domain account? What are the consequences of not doing so?
Is this account to be maintained post-install?
How do you reconcile this requirement with high-security organisations?
Refer http://technet.microsoft.com/en-us/library/cc263445(office.12).aspx)