Lets take things one step at a time.
What I'd do, is try getting MBAM installed on your computer. (Instructions below, a bit of background, now.)
Something is hijacking your internet settings, and, to put it simply, perverting sites you would want to go to and substituting its own. MBAM is likely to fix that.
There is a bit of a trick to getting it up and running, and it might seem a bit involved. The idea is to download the installer to a flash (usb) drive using another computer, and renaming it. The reason to rename it is that some malware identifies security programs by name, and blocks them. So the procedure will be to go to another computer, go to malwarebytes.org, save it as a renamed file to a (clean) flash drive, and then get it going on the sick computer. Make sense?
-On a clean computer with a flash drive inserted, go to www.malwarebytes.org
and click on the blue download button.
-It should ask you to save the file somewhere. Save it to the flash drive and name it something like 7birthstone.exe (the ".exe" is important, the name you choose should be unique; not likely to be an already-used file name. You choose. 7birthstone would probably be good.)
-Once it has downloaded, disconnect the flash drive from the good computer. Connect it to your infected computer.
-Drag the installed file from the flash drive to your desktop. (Or copy and paste it there.)
-Start the installer by double-clicking it, and let it install on your computer.
-Following installation, open the "my computer" icon, and navigate to C:\program files\Malware Byte's Anti-Malware, and inside that folder you will see an icon that looks like the picture below. Rename that file to 7birthsotne.exe
-Open the program by double-clicking that renamed file (you will not be able to use the desktop icon to open it after it's renamed.)
-Select the update tab, and update the program. (This may or may not work. If not, skip this step.)
-Run a quick scan. At the finish of the scan select "show results" (or similar) and place a tick beside anything and everything found, then select "remove selected''. If prompted for a reboot (restart) to finish removal, do so promptly.
-Following reboot, if you were unable to update the program earlier, do so now, and run another quick scan.
Please post the scan reports here (see "additional options" ) to the lower left of the forum reply window), or let us know if anything didn't work, with brief details.