Microsoft has recently issued a security advisory for an issue that affects most systems from Windows XP to Windows 7. They released a Fix It workaround until a patch can be released. Make sure and get your systems patched up to prevent even bigger problems!
To implement the workaround that disables .LNK and .PIF file functionality automatically on a computer that is running Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, or Windows Server R2 click the Fix this problem link under Enable workaround. To undo the workaround, click the Fix this problem link under Disable workaround. In either scenario, click Run in the File Download dialog box, and follow the steps in the Fix it wizard.