Is Spyware Blocker installed on my computer?

Untangle Spyware Blocker seems to be keeping me from using my Ebates account, and is also occasionally blocking other websites. Below are two examples of the block message that I get when I try to use Ebates to make a purchase.
I cannot tell that Untangle Spyware Blocker or any other Untangle product is installed on my PC.
Tech support from my computer supplier thinks that Untangle is installed in my router. I don’t believe this is correct because a second computer using the same router is not blocked in this way.
I have searched Add/Remove Programs and Revo Uninstaller and cannot find any sign of Untangle software.
The issue occurs in IE8, Firefox, and Opera.
Windows 7-64.
Your help is much appreciated.

"Untangle Spyware Blocker
This site blocked because it may be a spyware site.
Host: www.jdoqocy.com
URI: http://www.jdoqocy.com/click-46157-1...bs612753740sbe
Please contact ."

"Untangle Spyware Blocker
This site blocked because it may be a spyware site.
Host: www.click.linksynergy.com
URI: http://click.linksynergy.com/fs-bin/...bs638963425sbe
Please contact ."