How to Back Up Your File Encryption Certificate & Key
- 1). Click "Start."
- 2). Type "certmgr.msc" into the the "Search" box.
- 3). Press "Enter."
- 4). Expand the "Personal" folder, then click "Certificates."
- 5). Click the certificate that displays "Encrypting File System" under "Intended Purposes." If more than one certificate exists, back up all certificates.
- 6). Select the "Action" menu, select "All Tasks," then select "Export."
- 7). Click "Next." Select "Yes, Export the Private Key." Click "Next."
- 8). Select "Personal Information Exchange," then click "Next."
- 9). Type a desired password. Click "Next."
- 10
Enter the desired name for the file certificate. Click "Finish."
Source...