If for any reason you have accidentally or purposely removed IE from your computer and want to get it back, try this tip. To reinstall Internet Explorer:

1.) Place Windows XP CD into your CD Drive
2.) Go to “Start–>Run” and type
“rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 c:\windows\inf\ie.inf” and hit enter.

This should copy the IE files back to your computer so it is useable again.