I used malewarebytes, norton360, JRT, HitmanPro, adwcleaner, haokiller.bat all failed. finally I find my way and success. My example is after install qvod, maybe your installed software is different , so youe need search xxx.dll
1. check link path is correct and no error param 2. download https://www.malwarebytes.org/fileassassin/ 3. search c:\Program Files and c:\Documents and Settings QvodExtend.dll , QvodWebBase.dll 4. use fileassassin enable [delete on windows reboot] delete QvodExtend.dll , QvodWebBase.dll 5. restart windows 6. ie->properties->advanced->reset firefox-> in address field key in -> about:support -> reset