You will need to download a new copy of the installer after you have emptied your temporary internet files folder[the file has truncated and the information for that file in the temporary cache is corrupt]
To do this open internet explorer and select internet options from the tools menu. On the general tab press the settings button under the Temprary internet files section and then press the "view files" buttom on the window that pops up. If you want to keep your cookies[which may contain your personal login information]go to the view tab of the folder that pops up and select arrange by>type. hilight and delete all the rest of the files then press ok ok. Redownload the installer from httpss://archive.winmxworld.com/WinMX/.