The Windows Encrypting File System is a very dangerous tool. Microsoft made it far too easy for people to use this tool improperly and thereby permanently lose their data.
Before even thinking of using EFS, study "
Best Practices for the Encrypting File System" thoroughly and follow the guidelines.
With that out of the way, you may possibly be able to recover your data by following the advice here -->
http://support.microsoft.com/default.aspx?scid=kb;en-us;290260&sd=tech
As the article states:
NOTE: For any of the following resolutions to work,
the user's original account must still exist, and the user's profile must be present and unchanged since the user last had access to the data.
To recover all of the data, you must have one of the following:
- The original password. This is the password with which the user last logged on successfully and was able to access their credentials and files.
- Password Recovery Disk (PRD). This password recovery disk must have been created while the user had access to the files.