Repair IE6 & OE in XP

Launch REGEDIT from the Start menu's Run dialog and navigate to the key HKEY_LOCAL_MACHINE\SOFTWARE\ Microsoft\Active Setup\Installed Components\{89820200-ECBD-11cf-8B85-00AA005B4383}. In the right-hand pane, double-click on the DWORD value IsInstalled and change it from 1 to 0 (no matter whether you choose Decimal or Hexadecimal). Close REGEDIT and go to the Windows update site again. Now it should let you "update" IE and, with luck, fix the problems.

By the way, you can do the same thing if you need to repair Outlook Express, but at the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{44BBA840-CC51-11CF-AAFA-00AA00B6015C}.