Hi I have been using your program for about 6mo now, and thanks it really works well. But I have run into a snag, there is this program on a system that will not allow malewarebyte to run . I can boot to Safe mode and have uninstalled Defener Pro. When you boot to windows normal mode it locks the system. Os is Vista Home , I know there is defender pro internet security and defender pro pc repair on this system. I have tried without avail to install mailwarebyte, but unable to get in to install. Was able to uninstall defender pro pc repair from safe mode. On the defender pro website they endorse malwarebytes. Any info on this proggy would be appreciated.