Internet Explorer 8 Automatic Delivery Blocker
In these days Internet Explorer 8 will be delivered as High Priority update via Automatic Updates; Microsoft published a toolkit, named "Internet Explorer 8 Blocker Toolkit":
which disables or later reenables this behaviour. It consists of an executable, which extracts a .cmd file and a .amd policy.
The install and remove commands in the following WPKG installer are taken from the relevant parts of this script.
<package id="ie8ADblocker"
name="Internet Explorer 8 Automatic Delivery Blocker"
revision="1"
priority="1000"
reboot="false"
execute="once" >
<install cmd='REG ADD "HKLM\SOFTWARE\Microsoft\Internet Explorer\Setup\8.0" /v DoNotAllowIE80 /t REG_DWORD /d 1 /f' />
<remove cmd='REG DELETE "HKLM\SOFTWARE\Microsoft\Internet Explorer\Setup\8.0" /v DoNotAllowIE80 /f' />
</package>