Microsoft has released two important updates KB982526 (.NET Framework 3.5 SP1 update) and KB982670 (.NET Framework 4 Client Profile) for the Microsoft .NET Framework.
[Tip: You may first want to find out which version of .NET is installed on your Windows]
KB982526 update rollup addresses issues with Microsoft .NET Framework 3.5 SP1 on Windows 7 or Windows Server 2008 R2 (also available as updates KB956250 and KB982525 for Windows Vista
Some users have reported errors while installing these updates (error code 80200053), if you are not able to install these updates, do a restart and try installing.
|Windows Vista||x86 – KB956250||x64 – KB982525|
|Windows Server 2008 R2||x86||x64|