Get the LAME 3.99.5 zip file now. To C: extract the files. \ LAME. Open a command prompt window with administrative privileges. Open a command prompt as an Administrator on Windows 7, 8, or 8.1: From the list of applications in the Start Menu, select the Windows System area. Select Run as Administrator by selecting More from the pop-up menu when you right-click on the item for Command Prompt. If the User Account Control dialogue box opens, click Continue after making sure the action it shows is what you want. Start a command prompt in Administrator mode on Windows 10.