install of exchange server 2013 fails

I'm having trouble installing Exchange server 2013 on a server 2012.
Followed instructions on the internet and other available information, but I keep getting the following error.
The following error was generated when "$error.Clear();
          Install-ExchangeCertificate -WebSiteName "Exchange Back End" -services "IIS, POP, IMAP" -DomainController $RoleDomainController -InstallInTrustedRootCAIfSelfSigned $true
          if ($RoleIsDatacenter -ne $true -And $RoleIsPartnerHosted -ne $true)
            Install-AuthCertificate -DomainController $RoleDomainController
        " was run: "Could not grant Network Service access to the certificate with thumbprint 4F356FE4927AE18DF0765E1F2A94C5CECA1440CF because a cryptographic exception was thrown."

I hope someone can help me out here.
Thanks in advance
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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:

Have you seen this article?

This guy is claiming that once you remove the certificate this issue can go away, he is mentioning a bug in a image for exchange media from MS.
Kash2nd Line EngineerCommented:
try backing up the certificate.
Remove it
re-run the installation and see if it completes
Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:

That is exactly what the link above states to do :).

Making Bulk Changes to Active Directory

Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.

Kash2nd Line EngineerCommented:
there is a 10 second gap between you and me posting it so for sure I have not copied the contents from your link Mark ;)
joostsooAuthor Commented:
Hello Kash, Mark Bill
Thanks for your response.
I had seen that site and tried that.
For me it did not work.Screenshot of my certificatMore suggestions?
HariomExchange ExpertsCommented:
Please refer following article :-

By changing the ownership of the Certificates private keys to myself and granting Network Service Full Control the installation continued.

I did this through the Certificates MMC snap-in and click Manage Private Keys... in the All Tasks sub-menu of the certificate. Thanks for the help @spec01!

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