Note that many websites have their own advertising, unrelated to adware.
InetSpeak is a Browser Helper Object that adds a non-removable band of advertising and/or links below the standard IE toolbars.
The DLL responsible for InetSpeak is located in different places depending on variant. In installs from Music Magnet (BHO42602, WindowsIE), it is in the folder you chose to install the software from: by default this is 'C:\Program Files\mm(some numeric date)'.
In the 'Morpheus Upgrade' release of InetSpeak/WindowsIE, the file is in C:\Windows instead. In the eBoom variant, the file is in the Internet Explorer folder (in C:\Program Files, regardless of whether that is the drive/folder you are using).
Before you can delete the file you must deregister it using the 'regsvr32 /u' command. Open up a DOS/command prompt window (Start -> Programs -> Accessories), and enter (for the BHO42602 variant):
regsvr32 /u "C:\Program Files\mm050102\BHO42602.dll"
For the WindowsIE variant, the commands are:
regsvr32 /u "C:\Program Files\mm052202\WindowsIE.dll"
Or, if you have the version that installs into the Windows folder:
regsvr32 /u "C:\Windows\WindowsIE.dll"
For the Iexplorr variant:
regsvr32 /u "..\iexplorr11.dll"
For the eBoom variant:
regsvr32 /u "C:\Program Files\Internet Explorer\boombar.dll"
Reset the machine and you should be able to delete the DLL, and the whole mm(number) folder if you have one. You can also delete 'winietoolbar.ini' in the Windows folder to clean up.