There have been reports that users of Internet Explorer browsing over Google.com today have been alerted by Microsoft Security Essentials to have been affected by a certain Blacole.BW. the Item in question was apparently launched from this location:
file:C:\Users\***\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\RVUVKONX\google_com.htm
It seems that Microsoft’s own security software has flagged Google.com as a threat to have Blackhole Exploit Kit. This should be no cause for concern for those affected as this is most likely a false positive by MSE. Nevertheless, update your Security Essentials virus and spyware definitions just to be safe.