Microsoft has announced a very serious flaw effecting all versions of the Microsoft Windows operating system, even fully patched Windows 7 systems. It requires no user interaction to infect the system, simply viewing icons is enough to trigger it. Currently there is no patch for the vulnerability. Microsoft Security Essentials has added signatures for detecting it, most other vendors are likely to follow.
For more information, (Network World Article)
Sophos has a temporary patch to help lessen the threat, I haven’t tested it thoroughly. You can get it HERE.
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