Thanks to Eric for this one:
1) From the Control Panel select ADD/REMOVE programs. Select ?Blackstone? and ?Remove?.
If Blackstone is not present:
2) Close all internet explorer browsers.
3) Search your "C" drive for IEHelper.dll
4) Delete IEHelper.dll
If the system does not permit the file to be deleted proceed as follows.
5) Select ?Start? and then ?Run? and type ?regedit?
6) Find the entry named "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows \ CurrentVersion\Explorer\Browser Helper Objects\{00000000-5eb9-11d5-9d45-009027c14662}".
7) delete the {00000000-5eb9-11d5-9d45-009027c14662}entry.
8) Reboot computer.
9) Search your "C" drive for IEHelper.dll
10) Delete IEHelper.dll
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