Last week, Microsoft posted a slew of non-security updates for Windows 7, one of which was titled as follows: "An update is available to improve the stability and the reliability of Windows 7 and Windows Server 2008 R2." Unfortunately, according to a thread on Microsoft TechNet, the update (KB977074) is actually breaking the stability and reliability of the operating system. .....

...Microsoft moderator Arthur Li responded in the thread and recommended that users experiencing the issue should update their BIOS and their hardware drivers, disable any antivirus program they have installed, restart their computer with a clean boot, and try installing the update again. Nobody reported back to say whether this fixed the problem. He also marked an official answer for the thread which simply asks users to hide the update for the time being.

I haven't noticed any problems myself.