There are two ways to bypass WGA.

1. Follow these instructions in IE:
Tools
Manage Add-Ons...
In either 'Add-ons currently loaded in Internet Explorer' or 'Add-ons that have been used by
Internet Explorer'
Locate and select "Windows Genuine Advantage"
Then select the 'Disable' radio button
OK

2. When you get to http://update.microsoft.com/windowsupdate/v6/default.aspx?ln=en-us ,
where you have to choose between 'Express' and 'Custom' buttons,
before pressing the desired button, paste:
javascript:void(window.g_sDisableWGACheck='all')
in the address bar and press enter.
And remember, respect is everything.