It seems that the latest security patches from Microsoft, deployed over the last Patch Tuesday, are causing serious problems for some users of Windows, including Windows 7.
In a nutshell, the affected Windows machines simply stop working and start displaying a (mostly) black screen, in some cases showing only a "My Computer" Explorer window.
The problem was first noticed by UK security company Prevx, which already offers a software fix. The folks at Prevx claim this is no small matter and that this "massively debilitating" issue could potentially affect "millions of Windows users." However, no official fix is available from Microsoft yet.
A Microsoft representative said, "Microsoft is investigating reports that its latest release of security updates is resulting in system issues for some customers. Once we complete our investigation, we will provide detailed guidance on how to prevent or address these issues."