Please perform this online scan
ActiveScan does not remove adware/spyware but will autoclean for viruses & worms.
The scan results should include this entry.
Spyware:spyware/searchcentrix No disinfected HKEY_CURRENT_USER\SOFTWARE\DYNAMIC TOOLBAR
If so, go to Start-> Run and type: regedit
Go to File-> Export and save the registry as a backup.
Then navigate to:
HKEY_CURRENT_USER\SOFTWARE\ and delete
Reboot when done.