Wmp 11 beta 2 problem

when i try to install wmp 11 beta 2 it comes up with:

It was not possible to complete setup.

It then directs me to “web help” with the error message “C00D2AFB”

And apparently this was caused by the original error code “80070005”

but of course microsoft’s help page says:

Additional information is not currently available for this error.

So does anyone have any idea why my setup is failing? And is there anything i can do to fix it?

p.s. i tried to install beta2 because recently i havent been able to watch mms:// videos on the internet. any advice on that issue would also be great