Export a user certificate from Internet Explorer

• On Internet Explorer go to Tools / Internet Options / Content / Certificates
• You'll find your certificate in the Personnel tab. Select it.
• Click on Export and get through the first page of the helper
• Select Export the private key then click on Next
• Select a PKCS12 exportation and only tick the first of the 3 boxes (Include all certificates in the certification path if possible). If the file is going to be imported on a machine with a recent Windows you can also tick the second box (Enable strong protection).
• Then enter the password of the PKCS12 file encypherment (twice). This password will be essential to re-import the certificate and its private key.
• Finaly choose the file's path and name
• Confirm the recap. The file is created!