Windows Update repeated installs.

[AWS]

I usually let Windows Update do what it needs to do but it has installed these two updates over 20 times and every time I sign on it downloads them again. Any ideas? Security Update for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server
2008, Server 2008 R2 for x64 (KB2656351) and Update for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server 2008, Server 2008 R2 for x64 (KB2600217)

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