The mbam.exe should be in C:\Program Files (x86) \ Malwarebytes Anti Malware, or something. You may have installed it in the wrong place?
Extra note: Windows 7 is secure for several hours, without extra Anti Virus. Turn off your Trend, and any other security programs you may have, reboot, be sure they aren't running, and try System Restore. By the way, you shouldn't have several securities running.
Later on, reboot, and start Trend. Most evidently, I think, you have a collision in your system.