If you have upgraded your Windows XP installation to XP3 and are using IE 8 Beta 1, you may wish to read this IE blog entry to make sure you do not fall between the cracks. What cracks? If you have installed SP3 after installing IE Beta 1, you will need to uninstall IE Beta 1 manually. The problem with installing IE Beta 2 without first uninstalling IE Beta 1, may result in a system in which you will not be able to uninstall SP3 or IE Bate 2. Note: You will however will still be able to install later builds of IE 8 when it becomes final.

Confused? Read the Microsoft heads up solution from the IE blog below labeled below as Source, and make sure you follow these directions exactly:

To avoid getting into this situation, we strongly encourage you to follow these steps before installing Internet Explorer Beta 2:

  1. Uninstall Windows XP SP3
  2. Uninstall IE8 Beta1
  3. Re- install Windows XP SP3
  4. Install IE8 Beta2

If you do not follow these instructions, you may end up with a system in which you can not uninstall SP3 or IE 8 Beta 2. This is only if you have installed IE Beta 1 and than upgraded to SP3.

Comments welcome.

Source.