I recently upgraded to Malwarebytes 2.0 without thinking much about the decision since Malwarebytes (henceforth referred to as MWB) has always served me well, to the point where I even purchased a license for it ages ago. Seeing the publicity including on Facebook for the newest version trumpeted as a great release, I went ahead with the upgrade. I immediately ran into problems with the self-protection module options. I noticed that it was interfering with several of my applications. Indeed, upon attempting to start said applications, explorer.exe would crash. Furthermore, it would enter a state in which it was unkillable by any means I tried including elevated command prompt taskkill /f command. My computer could not be restarted safely either. I was forced to pull the plug. I reload Windows. Immediately open up mbam and its new terribly looking GUI, find the self-protection module in the settings, then attempt to uncheck/check the box. mbam freezes indefinitely. The process became similar to the explorer.exe in the paragraph described above. Again, I was forced to pull the plug on the computer. I reload Windows again. Now MWB is completely gone. It won't start up on Windows boot nor would it start when I attempt to start it via cmd even with elevated privileges. I attempt to start the programs whose previous boots were prevented by MWB. I experience the same error as the first one in addition to MWB not even being present (i.e. its process was not listed in tasklist). Again I am forced to kill the power. I reload Windows again. Now none of my programs would start. I am only able to open a browser as explorer.exe inevitably fails again and all my CPU's are running at a constant 100% load. I was slowly able to download the mbam-clean removal tool and remove MWB from the system. I was unable to exact my product key during this removal process. I am still unable to restart Windows safely. I kill the power again. I reload Windows again. MWB is FINALLY removed from the system and my programs are running again! However, I am now no longer under the protection of a program I trusted for so long, the one and only security program I ever spent money on. This is where I am writing this post. I am wondering if there is a way to reinstall Malwarebytes version 1.75 (the verison right before 2.0) and get my product key back. Meanwhile, I highly recommend those who have not upgraded to not do so currently.