cannot remove justunblock

Hello. Sometime around christmas I chose to use the free trial of just unblock. When the free trial was over, i didn't continue with it. But what I get when trying some sites is the message
"You're connected to JustUnblock DNS, but your current IP is not authenticated
"
I have tried on different browsers with the same result.
As for what I have done.
I have run the free version of malware bytes. It did no good.
I tried connectivity fixer but no good.

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Professional, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM)2 Duo CPU E7300 @ 2.66GHz, Intel64 Family 6 Model 23 Stepping 6
Processor Count: 2
RAM: 1900 Mb
Graphics Card: Intel(R) Q45/Q43 Express Chipset, 822 Mb
Hard Drives: C: Total - 152525 MB, Free - 2600 MB; E: Total - 476821 MB, Free - 1624 MB; F: Total - 238414 MB, Free - 1364 MB; G: Total - 715402 MB, Free - 2853 MB; H: Total - 953867 MB, Free - 1243 MB; I: Total - 953867 MB, Free - 2050 MB;
Motherboard: LENOVO, LENOVO
Antivirus: avast! Antivirus, Updated and Enabled