Update: Starting with Build 5335, "Show Updates" does not have to be enabled
for IE7 Beta to appear in the list at A/RP.
--
~PA Bear

Jim Pickering wrote:
Running XP? In Control Panel, Add/Remove Progams, do you have the box to
"Show Updates" checked. If not, check it, then scroll to the bottom of
the list under the updates and Hot Fixes and you'll find the IE7 Beta. It
should be uninstalled from there.
snip