Lots of discussion yesterday and today about Security Essentials warning about infection with JS/Blacole.BW when accessing Google.
It seems to have been a false positive now fixed by installing new Security Essentials definition.
http://www.microsoft.com/security/po.../HowToMSE.aspx An even more recent update to 1.119.2014.0 is available now.
No need to read these unless you want to see the issue unfold
http://social.technet.microsoft.com/...f-f6ac0a67a226
http://answers.microsoft.com/en-us/p...5-eeafdfdab469