you can also try some of the iOBit system care advanced. Go on youtube and search up "iOBit System Care Advanced 5 Cracked" and look for the best resource that will not get you bull shit surveys or virus's.
also use this, as this may help you:
You must login or register to view this content.
Run the tool and just click "run" or "start" can not remember at the moment. It should change your computers DNS servers, if not then visit:
You must login or register to view this content.
also use that to check if it changed it at all for you. Cheers hope you get better connection