Hi,
From Internet Options> Programs, check the box "Internet Explorer should
check to see..." Close and re-open IE. When asked if you want to make IE the
default browser, click yes.
Also (Windows XP) Control Panel> add or remove programs> Set program access
and defaults, choose Microsoft Windows or make your choice in Custom.
If you encounter problems, see
http://windowsxp.mvps.org/IEFAQ.htm Tips #7,
41, 50.
Hope this helps,
Don