What is MCO?
MCO stands for Messenger Content Object. An MCO file is a CAB file containing MSN Messenger/ Windows Live Messenger content (custom emoticons, winks, display pictures, backgrounds, deluxe display pictures and dynamic backgrounds) together with some information (in the file content.xml) to allow the content to be installed into MSN Messenger/ Windows Live Messenger. ConCon Retriever makes backup of your MSN Messenger/ Windows Live Messenger custom emoticons, winks, and other contents into MCO file(s). MCO files can be viewed/ edited/ installed into MSN Messenger/ Windows Live Messenger by some other tools, including ConCon MCO Editor. Top I couldn’t find my PUID Currently you should be able to find your PUID somewhere in account.live.com, but Microsoft may change it anytime. 5 Dec 2007: Now you can find it on https://account.live.com/editprof.aspx (Find “Unique ID” on the bottom) Top I cannot install my MCO See MCO Editor FAQ. Top I got an ‘EOleSysError’ exception If you got an error li