Windows update from client side

Hello,

I've installed a MS Network -file, printer and Internet sharing- on 5 local computers. Everything working fine.
I could execute Windows98 update from my Server computer, BUT NO CHANCE to execute it from the client computer. I got "To install items from Windows Update, you must be logged on as an administrator... click on start , right click on windows update, select as admistrator" messge error.

On windows 98 I have not the right click option "as adminstrator"

Thanks for yr help
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