Run your Command Prompt as administrator. You can search for it in the Windows Search Bar as 'cmd'. Inside, type in these commands: mkdir \temp (this creates a new folder named 'temp') cd \temp (this prepares the folder to receive a log-file) You can find the c:\temp folder by simply using copy/paste and inserting 'c:\temp' into the search bar of your file explorer. Now copy/drag the Busylight software .msi file into the c:\temp directory using file explorer. Now type this command in the same Command Prompt msiexec /i "NAME OF INSTALLATION FILE" /L*v "setuplog.log" Once you've done this, the installation should run through its process. Whatever happens during the installation process (successful, crash, missing plug-in, etc), a setup log-file will appear in the c:\temp folder.