Repeating updating of SU for Microsoft.Net

Hi, Since yesterday I keep receiving a prompting to install the very same updates: one is Security Update for Microsoft.Net Framework 4 on Windows XP etc (KB2656351) the other is Update for Microsoft.Net Framework 4 on XP etc (KB 2600217). I keep installing them, the Windows Update shows that each time both of them were installed successfully, but I still keep getting a prompt about the very...