|For next time...|
When you have more than one internet browser installed, when you start up a browser that is not the default browser you get a message "xxxxx" is not the default browser. Did you want to make it the default browser ? , or similar.
If you answer yes, or similar, that browser becomes the default browser.
In your case, you would then see the message when you use IE.
Default browser = the one that will be used when something automatically goes to the internet.
If you click on the box beside Don't show me this message or similar to insert a check mark, on the same message box as not the default browser, you will NOT see the message when you open the browser that it's not the default browser, etc. That can be re-enabled.
All versions of XP come with IE 6, but there are MANY web pages that no longer work properly with it.
You should have IE 8 installed.
Installing IE 8 installs some software that is not specifically for the IE browser that all internet browsers benefit from.
There are some things that you can only do with IE.
E.g. use the Microsoft Update or the Windows Update web page on the Microsoft web site.