ASWclear from here will do that http://www.avast.com/eng/avast-uninstall-utility.html

Could you try an F-Secure online scan

Please run the F-Secure Online Scanner

Note: This Scanner is for Internet Explorer Only!
[*]Follow the Instruction Here for installation.
[*]Accept the License Agreement.
[*]Once the ActiveX installs,Click Full System Scan
[*]Once the download completes,the scan will begin automatically.
[*]The scan will take some time to finish,so please be patient.
[*]When the scan completes, click the Automatic cleaning (recommended) button.
[*]Click the Show Report button and Copy&Paste the entire report in your next reply.