It is best to remove webhancer through Add/Remove programs before running Ad-Aware. Be sure to reboot afterwards. And yoiu should have the following zip file on hand to unzip and run in case the removal results in loss of internet connectivity:
http://www.lavasoft.de/aaw/binary/whndnfix.zip
After you download Ad-Aware, you should also download the current reflist update. Unzip it and copy it to the Ad-aware programs folder and run it before running Ad-Aware.
When you do run Ad-Aware, make sure you do a memory scan, deep registry scan and all drives on which you have installed programs. When it completes, check all the entries it finds and click "make backup". Then Finish. Reboot afterwards and run Ad-aware a second time to ensure complete cleaning.
I would also advise removing mdm.exe from your startup list -- although it is not related to your current problem, it is a resource hog and produces unwanted error prompts which are of value only to programmers.
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q221438
To remove it from the registry, run
regedit and navigate to the key indicated in the MS article; right click on mdm in the right hand pane and delete it.
Additionally, I would strongly recommend uninstalling
mosearch
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q282106
Like Find Fast, it is a useless and resource hogging application.