While installing Product Design Suite Ulimate 2015, I had a system restart for some unknown reason, after restart, I restarted the installation of the Product Design Suite. Only to find that it now showed that AutoCAD Mechanical 2015 was already installed. Upon checking the installed programs, everything installed but Mechanical 2015. Tried reinstall and repair, but that was useless. Uninstalled the Product Design Suite, removed all associated directories, and attempted reinstall, only to find that the installer is showing that I have Mechanical 2015 installed. I have double check to make sure that it is not installed, could this be a problem in the registery files? Any ideas?