Give A Right Click On The Internet Icon And Go To Properties
Next Window Will Be Like This
Click On CONTENT
Click On The CERTIFICATES And The Window Will BE Like This
Select The Certificate Which You Want To EXPORT And Click On The EXPORT Button
Click Next To Proceed Further
Select No Do Not Export The Private Key And Click Next
Select The First Option And Click Next
Click On BROWSE
Next Window Will Be
Select The Desktop
Mention The File Name At The Space Provided ( in whose name you have taken the certificate) And Click On The Save Button
Click Next
Click On Finish
Click On Ok
Click Close
Click OK
Now On Your Desktop There Is An Icon Of Green Colour Which Is Your .cer Format Or The Public Key.
