Changing certificate on Windows to SHA-256 question on windows update

I have a windows 2808 R2 server-Service Pack 1- 64bit.  I have to change the certificate from a SHA-1 to SHA-256.  I found a windows update article that says there could be an issue with this at this link.
http://support.microsoft.com/kb/2763674 

Should I install this update or should I just install service pack 2?  I checked my current updates in add remove features and this udpate is not listed as installed on my server.

I am not sure how to proceed. Don't want an issue after I start the process and need to know what I should do before swapping out the certificate.
kdschoolAsked:
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Cliff GaliherCommented:
Have a backup. But it should be fine.
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Cliff GaliherCommented:
That update does not apply to 2008 R2. And there is no such thing as SP2 for 2008 R2.
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kdschoolAuthor Commented:
I checked and there is no service pack 2 for windows server 2008 R2. Also I have installed all the windows updates to date that have come through the windows update process.  Really not sure what to do now.
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kdschoolAuthor Commented:
I see your note now.  So should I just install the new type certificate and do you think I will have a problem with that?
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kdschoolAuthor Commented:
Ok, Thank you.  I will for sure back it up before I do it.
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