We will then see a list of DLL files at the end of the process that we can investigate further if we so choose. SOLIDWORKS 2017 uninstall will assist some of these issue by bypassing errors that are due to an inability for a related DLL file to become unregistered. This is typically due to complications involving permissions within the windows registry. Many times what is discovered through examination of the installation log files, is that the DLL files are unable to be unregistered. Prior releases of SOLIDWORKS would ask you to pick up the saved log files and forward them along to your VAR for further diagnosis.