If you are running either Outlook 2000 or Outlook 2003 and notice a slow keyboard response, the problem may be the Windows update for Internet Explorer KB931768. Remove the patch and the problem will often be resolved.
If not, other users have mentioned these fixes:
- Remove Spybot
- Change from HTML to plain-text format
- Change the Outlook Tools/Options/Security/Security Zones to Internet
- Uninstall Windows update KB930916