It is important to always use the latest stable release of Windows Live Messenger and to download it from the official website. If you download Messenger from a different website you risk installing a version that is not up-to-date or that contains a virus or other unwanted things.
Links for downloading Windows Live Messenger, Windows Messenger, and Messenger for Mac can be found at this websites downloads section. Additionally there are several quite good alternative clients available including a full working webmessenger that works via your internet browser.
If you are having problems installing Windows Live Messenger and receive an errorcode you might be able to find a solution in one of these articles:
If setup doesn't work for a different reason and/or you were not able to fix it with our articles please report at our forum and we will have a look into it.
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