windows Patch failed to update

Dear Experts,
Thanks in advance. I am trying to update patches manually through windows update but its failed to update.
Please suggest what to do next. I tried to reboot but no result

Security Update for Microsoft .NET Framework 4.5, 4.5.1 and 4.5.2 on Windows 7,
Vista, Server 2008, Server 2008 R2 x64 (KB3097996)

Installation status: Failed
Error details: Code 643
Update type: Important

 
 Security Update for Microsoft .NET Framework 4.5, 4.5.1 and 4.5.2 on Windows 7, Vista,
 Server 2008, Server 2008 R2 x64 (KB3074550)
Installation date: ‎
Installation status: Failed
Error details: Code 643
LVL 1
JJ KRWindows System administratorAsked:
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Windows Server 2008

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