Block a Javascript to run

Avast Free Antivirus / Premium Security
1

Hi

I am using Avast Antivirus FREE for a year and it was working well for me. But, I am facing a problem from last few days. Whenever I try to access any website through any browsers(IE7, Mozilla, Safari, Chrome), following script try to run:-

It opens a pop-up with AD. Can you Pls, inform how can I block this script to run? I have scanned the PC multiple times including boot-scan also, but can’t get rid from this script. Pls, help me in this regard.

Regards
Debasish

2

Deb, I’m not an expert on cleaning.
The general cleaning procedure although could be this:

  1. Clean your temporary files.
  2. Schedule a boot time scanning with avast with archive scanning turned on. If avast does not detect it, you can try DrWeb CureIT! instead.
  3. Use MBAM (or SUPERantispyware or even Spyware Terminator) to scan for spywares and trojans. If any infection is detected, it is better and safer to send the infected file(s) to quarantine (Chest), rather than simply deleting them.
  4. Test your machine with anti-rootkit applications. I suggest avast! antirootkit or Trend Micro RootkitBuster.
  5. Read this instructions and provide more info with the logs generated.
  6. Clean your Hosts file (replacing it) with HostsMan tool.
  7. Disable System Restore and then reenable it again.
  8. Immunize your system with SpywareBlaster.
  9. Check if you have insecure applications with Secunia Software Inspector.