How can my localhost contain malware?

[Dr_general]

I'm using Joomla 2.5.7
I'm basically rebuilding my previous website. I was copying content from my previous website in localhost but the following error appears:

" Warning: Something's Not Right Here!
localhost contains content from http://www.mywebsite.com , a site known to distribute malware. Your computer might catch a virus if you visit this site.
Google has found malicious software may be installed onto your computer if you proceed. If you've visited this site in the past or you trust this site, it's possible that it has just recently been compromised by a hacker. You should not proceed, and perhaps try again tomorrow or go somewhere else.
We have already notified http://www.mywebsite.com that we found malware on the site. For more about the problems found http://www.mywebsite.com , visit the Google Safe Browsing diagnostic page.
Go back
If you understand that visiting this site may harm your computer, proceed anyway.

Help improve detection of malware by sending additional data to Google about sites on which you see this warning. This data will be handled in accordance with the Safe Browsing privacy policies. "

I've scanned my joomla directory and even full system by BitDefender 2013 and it is updated. I dont find any threat.
How can i solve this problem?

[deathbrigner]

How did you get this error ? By accessing your site via a google search ?

[Dr_general]

when i clicked on view site this message was automatically generated by chrome, even firefox.

Actually this appears only on 1 article ...when i delete it .. the message disappears, i dont know what is the real problem