If you can get it running in Safe Mode with networking, we can go from there.
How to get into safe mode?
Right after you turn the computer on, BEFORE Windows starts, Press F8.
Then using the directional keys, move down (or up) to Safe Mode with networking.
Once it is fully started up and logged in, Open up Internet Explorer, or firefox.
The browser was most likely hijacked with a proxy put under the settings, so to remedy that.
Then click the "connections" tab, and then the "LAN" settings button. If anything is checked in the LAN Settings window, uncheck everything.
For Firefox ( I usually forget this method. I have had your problem before, I dont remember Firefox or Chrome being hijacked. )
Click Advanced, Then on Settings. Then Check "No Proxy".
Now that your browsers are proxy free, and will no longer redirect.
Download that, install it, update it, and do a quick scan.
All of this can be done in Safe Mode (With networking)
I usually do it that way. Its just simpler for me.
It is said that Malwarebytes isnt as effective in safe mode as it is in normal mode...Do the quick scan in safe mode anyway. (In most cases, quick scans are sufficient)
Then when Malwarebytes is finished scanning, Have it remove the malicious software it has found, and restart the computer as it tells you. If it doesnt tell you to restart the computer, thats alright, You can just restart yourself....
You can let your computer boot up normally. The virus should be gone, and once it is fully started up, Do another quick scan with Malwarebytes, to be sure...
If my method does not work for you. There are articles here that should be able to help you, I'll give you a link.http://www.bleepingcomputer.com/virus-remo...-security-suite
(Theoretically, that guide should work for most of the fake anti virus programs, as I have used the instructions on that guide for more than just the Rogue that is mentioned in that guide.)