Back+up+your+EFS+certificate

If you use the Encrypting File System (EFS) that's built into Windows 7 Pro, Enterprise and Ultimate, you should back up your EFS certificate so you can recover your data if the encryption key stored on your hard drive gets corrupted or deleted. Here's how:
 * Back up your EFS certificate **


 * 1) Click **Start** and in the search box, type without the quotes “ **certmgr.msc”,** then press **ENTER** to open the Certificate Manager.
 * 2) Expand the **Personal** node.
 * 3) Click **Certificates.**
 * 4) Scroll down to find the certificate that shows "Encrypting File System" in the **Intended Purposes** column, and click it.
 * 5) Click **Actions | All Tasks | Export.**
 * 6) On the first page of the Export Wizard, click **Next.**
 * 7) Click **Yes, export the private key** and click **Next.**
 * 8) Click **Personal Information Exchange** and click **Next.**
 * 9) Enter a name for the file and location where the certificate will be stored. You can also click **Browse** to navigate to the location in the file system and just type a name.
 * 10) Click **Finish**

If you see more than one EFS certificate in the Certificate Manager, back them all up. Store them in a safe place, such as on a USB key that you keep in a safe physical location.
 * NOTE:**