Trend micro seems to have an issue with Malwarebytes free version even though it's an on demand scanner. What you could do is uninstall Malwarebytes as prompted, then re-install it again and see if Trend Micro barks at it again. Compatibility issues usually arise when 2 Realtime Active scanners run at the same time and that's not recommend to do so. The free version of Malwarebytes does not run in realtime it's an on demand scanner so there should be no compatibility issues, and will not hurt anything.

yes it does send you to cnet for the download that is fine, on the linked thread I provide a link to a nice tutorial on how to get it, install it, update it and use it. Do not mistake malwarebytes for a replacement for your antivirus program it is not. It is an antimalware scanner but you still need to have an updated running antivirus program on your computer. I currently use AVAST free when you removed Norton did you use the special Norton removal tool? if not you will need to do that prior to installing a new antivirus program to get all the left over bits of Norton out, it is very hard to remove all of it. This list on Corrine's blog lists several removal tools Antivirus Product Removal Tools How to Install, Configure, and Use Avast Antivirus

Shaddy: You should be able to download the installation program here: https://www.malwarebytes.org To uninstall the program because it was causing trouble, I went from Start>Control Panel >Programs and Features, and then found Malwarebytes in the list of programs and clicked on its name to select it, at which point a row of possible things to do appeared up above the list. One of them was Uninstall, so I clicked on that to uninstall the program. I am running Windows 7 and your PC's operating system may do things a bit differently so far as the names of things are concerned, but the general idea is to use the Control Panel to uninstall programs. In my case, it was a bit more complicated than that, because Windows said it couldn't uninstall Malwarebytes as something was missing. To fix that, I downloaded a new copy of its installation software and installed that, then I was able to uninstall the whole thing. I have been too busy to reinstall and try using it again, but expect to get around to doing that today. And I sure hope those nagging pop-ups will have disappeared. If not, I guess my only option will be to keep uninstalling the program and reinstalling it from time to time as needed. Hope it doesn't come to that, because it's really a good program.

If you format the drive you'll lose all of your data, that's really a last resort (although in bad infections it's sometimes necessary). If you can't find on MalwareBytes how to continue with the free version, uninstall it and redownload it and don't check (or uncheck if already there) anything about a Trial Version. Also, download SUPERAntispyware Free Edition (it's the red one on the page) and let it scan your computer and follow the prompts to remove anything it'll find, there will likely be a sizeable amount of cookies and maybe other creepies. Whenever downloading anything, check to make sure you aren't also downloading any affiliated products, there will usually be a box with one or more items checked, always look carefully to make sure you're only installing the program you want and uncheck any boxes of other offerings. It would be a good idea to run an online virus scan as well, Trend Micro's Housecall is a good one. If you don't know whether you have a 32 or 64 bit operating system, click the "Not sure which one to choose?". Best of luck cleaning things up, JoAnn.