DO NOT use the System Explorer to change your IE
settings, as the defaults for MSAS must be changed
elsewhere before you can use the "retore" feature in
System Explorer.
You must go to Tools > Advanced Tools > Browser Hijack
Settings Restore, click on the "Change restore setting to
a new URL..." hyperlink, type in
www.yahoo.com, and press
Enter. You might have to check the box next to
the "Start Page" line and then press the 'Restore' button
at the bottom left of the screen to "restore" yahoo.com
as the start page.
I'd suggest using this feature to make ANY changes to IE,
as there are bugs in the System Explorer feature. If you
try to change the default Start Page using System
Explorer, it will change to msn.com, not the domain you
type in.
Alan