1. Launch MMC
Press and hold down the Windows key and R till the run option appears and then type in MMC and press enter.
2. Select Snapins
Click the Menu option File and in the drop-down list click on "Add/Remove Snap-in"
3. Select Certificates
On the left hand side, click on Certificates and then click the Add button in the middle, on the new window select "Computer Account" and click next and then Finish
4. Click OK
Click OK to load the Certificates Snap-in.
5. Save Snap-in
Press Ctrl S on your keyboard and give it a name, you will notice the default location is "Windows Administrative Tools"