If you uninstall a Windows 2000 56-bit hotfix, after you install the Hiigh Encrytion Pack, the wrong version of some files may be placed in the uninstall folder. If you subsequently uninstall a service pack, you will definitely have stability and functionality problems.
NOTE: To determine your encryption level, open Internet Explorer and press Help / About Internet Explorer. The cipher strength is listed.
NOTE: The Windows 2000 High Encryption Pack is available at http://www.microsoft.com/windows2000/downloads/recommended/encryption/