I was shocked to see this thread and tought as how MS did not provide uninstall/ Romove option for IE7 Beta1
I tried to run the setup file again..Urekaa
...got the following window.
*img114.imageshack.us/img114/3298/ie72hm.jpg
U can simply uninstall IE7 from Add/Remove Programs.
but just make sure that
Show Updates is selected.
*img114.imageshack.us/img114/8393/unie72pj.th.jpg
(Click Image for Full size)
When I'm able to do that, Y can't U