I have always heard those things you are experiencing referred to as "browser hijackers" as they are hijacking your browser. The symptoms you descripe -> going to sales sites instead of desired location, slow browsing, pages unable to load, are all common to these pieces of malware.
Any time you become infected with malware, your best bet is a full wipe and load. Many pieces of malware either openly invite additional malware or at least open the door for more to come in, so odds are you have multiple infections. No AV product gets every piece of malware. I run Panda Cloud along with Threatfire on an 'ALWAYS ON' basis and routinely run Malwarebytes as a manual scan.
If you don't want to do a fresh load, then you can try running Spybot Search and Destroy along with some other AV tools. You should run at least one stand alone bootable AV product from outside of Windows, preferably 2, in addition to running at least one within windows. Kaspersky, Panda, and several others all make a free bootable tool you can use.
Your Malwarebytes scan looked like it found some things but it didn't repair them and you should run it again, instructing it to repair/delete anything found.
Your safest bet, however, is to offload your data onto a backup device (DVD/external HDD/etc.) and then reload Windows. Before the machine connects to a network/internet, you should install your desired AV program along with its current database version. You should then run Windows Update until you are told there are no updates. You will probably have to reboot at least 3 times during this.
Once you have AV installed, up to date, and Windows is updated, SCAN your data backup and then load it back on to your machine, along with installing any other programs you need. Once your system is configured to your liking for day to day use and has all your data in place, create an image of the drive with which you can easily wipe and restore should the need arise. Marium offers a free version of their Reflect program which is very easy to use for this purpose.
Next, practice safe hex. One of the best ways for you to do this is to make sure that you are using a standard account and not an administrator account, to do your day to day computing.
The 3 most common sources of malware on the internet: gambling sites, porn sites, and warez sites (so-called "file-sharing" of copyright protected software like piratebay and uTorrent).
1) If you have enough money you can afford to lose it gambling, please send it to me, because I need it, desperately.
2) You shouldn't steal software. There is enough free stuff out there to do just about anything you need anyway (check out Sourceforge, for example) and programmers deserve to get make a living on their work, just like a carpenter, a pipe-fitter, or an accountant.
3) Finally, porn has been proven to have a very negative effect on society, ethics, morals, and relationships, so you should really try to be strong and avoid it.