Windows update fake?

Code:

Security Update for Microsoft Chart Controls for Microsoft .NET Framework 3.5 Service Pack 1 (KB2500170)

Installation date: ‎12/‎20/‎2011 11:04 PM

Installation status: Successful

Update type: Important

A security issue has been identified that could allow an attacker to compromise your Windows-based system that is running the Microsoft Chart Controls for Microsoft .NET Framework 3.5 Service Pack 1  and gain access to information. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.

More information: 
http://go.microsoft.com/fwlink/?LinkId=221536

Help and Support: 
http://support.microsoft.com

I can't seem to find this anywhere, I think a virus planted itself there and possibly to other updates. I've seen the software update forum and its not there either, without doing any tests can this be verified so I don't have to worry?

W7 64bit Ultimate

 

Sorry this double post, didn't mean to.

 

Looks legit to me. It's a patch/update for Microsoft .NET Framework 3.5 Service Pack 1
Check in Control Panel -> Programs and Features -> From this list look for Microsoft .NET Framework 3.5 Service Pack 1

Source: KB2500170