A little while ago Microsoft has published an important Security update (KB983590) which solves o vulnerability a .NET Framework 3.5.1 and Microsoft Silverlight on all operating systems Windows 7 si Windows Server 2008 R2.
Vulnerability is quite serious according to those from Microsoft, the attacker can get total control on computer / laptopthe target.
Microsoft Security Bulletin MS10-060 – Critical
The update recommended for all Windows 7 and Windows Server 2008 R2 users is available in two versions. Download & Install or vineyard Windows Update Center (Windows Update Settings)
Download Update for .NET Framework 3.5.1
Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2
After installing the KB983590 update, you will have to Restart your computer.
In addition to this update, Microsoft published in last 48 hours inca seven updatesof security for Windows 7.