UPDATE: As my guess , this issue was reported by Microsoft as False Possitive! Still interesting to read.
Virus Alert, by Microsoft Security Essentials, I am not really sure what is going on. One of the End Users in the office called me and asked for Help. Every time he goes to “Google” , his security essentials was warning him, “Potential Threat Detected”
Looked carefully, yes it was true.
All what he was doing is
www.google.com and guess what!
![clip_image002[5]](http://www.erdalozkaya.com/image.axd?picture=clip_image002%5B5%5D_thumb.jpg "clip_image002[5]")
Now look carefully.
I fully scanned the computer with a up to date offline scanner, nothing was wrong, for testing I went to my PC and had the same result, remotely connected home and again same result.
Was it Google or Microsoft Security Essentials?
MS Security Essentials is warning us that Google is hosting a possible “exploid JS/Blacole.BW”. Based on my investigations this looks like a FALSE POSSITIVE alert.
There was no issue when I went to my favourite search engine, also other search engines, but Google. From what I can investigate Google looks harmless.
Not just www.google.com also www.google.com.au , www.google.com.tr or even www.google.de gets the same alert from, Security Essentials , WARNING “ Exploit:JS/Blacole.BW “
I have still no details about it but will keep an eye on it.
Anybody else having the issue, then please e-mail me 
Again its most likely a False Positive Alert but
Be careful
UPDATE: ( 4 hours later from this post Microsoft relased an update)
Exploit:JS/Blacole.BW
Summary
On February 14, 2012, an incorrect detection for Exploit:JS/Blacole.BW was introduced. On February 14, 2012, Microsoft released an update that addresses the issue. Signature versions 1.119.1988.0 and higher include this update.
Technical Information (Analysis)
On February 14, 2012, an incorrect detection for Exploit:JS/Blacole.BW was introduced. On February 14, 2012, Microsoft released an update that addresses the issue. Signature versions 1.119.1988.0 and higher include this update.