try this program http://www.revouninstaller.com/
It will remove everything.
Just look for webroot or type it in it search.
To uninstall a Program simply double click on its icon in Revo Uninstaller.
Itíll then provide you four modes to uninstall a software: Built-in, Safe, Moderate and Advanced. (I like Advanced)
Now it will uninstall the program.
when it finish uninstall go back to Revo click selected all then delete.
Click next then selected all then delete.
Hope this help