as LocalSystem, as you noted, so they often can't access network drives which require a certain user or group membership to work. The computer startup scripts run in the computer context, i.e. When using Active Directory, a similar interface is used to edit AD Forest-hosted group policy objects (GPOs), so the same settings are available across a bunch of machines. GPEDIT.MSC is the Group Policy editing console, and runs against the local computer's Local Group Policy store when it's used directly, so it's useful for setting local-only parameters. after computer startup, when a user logs on) in the User configuration bit. There's an equivalent logon script area (i.e.
Windows 2000 and above offer a computer Startup Scripts collection in the policy editor: Short answer: GPEDIT.MSC (Start, Run, GPEdit.msc)