That´s good news
To tell the truth - I´m not sure how it happens, it
could be clicking on a (wrong) link, or visiting an "innocent" looking side.
We recommend Avira or Avast Antivirus.
Download Avira Free AntiVirus, from here ->
Avira
Or:
Avast
Save the installations file to desktop, don´t install it now.
Download the Norton Removal Tool (SymNRT) to your Desktop.
http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2005033108162039
Once downloaded please close ALL open browsers, also save any work because this may require a restart.
Go to your desktop and double click on the removal tool and then click Setup.
Once open Click Next
Accept the license agreement and click Next
Type in the letters/numbers that you see into the text box then click Next.
Then click Next and the tool will start running.
Once finished restart the PC and run the tool again to ensure everything has been removed.
Delete Nortonremoval tool from your Desktop.
Restart
Install the antivirus program you have choosen.
Then, please attach fresh hujackthis log, for a final check