EFS encryption with Windows XP

If you encrypt your drive in Windows XP, you can not restore and use the folders on another PC. To use elsewhere, backup your keys.
Add in Snap-in → Certificats
Click Add and then Finish → Close OK
Goto Certificates Current User → Personal → Certificates
Click file Recovery under Intended Purposes
Right Click on the certificate, AllTasks → Export. Export the private key and certificate to pfx format. Deselect Delete private key on successful export.
Save the pfx file to a disk or CD for future use.