Knowing Yahoo Messenger version is very important to determine if you are using old version software with bugs or latest version that offer more feature, improvements and security. Here is simple way to check version of Yahoo Messenger installed on your computer.
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Login into Yahoo Messenger. Goto Help menu option and then click on ‘About Yahoo Messenger’. You will get a pop-up window showing latest version of Yahoo Messenger like Yahoo Messenger (9.0.0.2152). If you are using old version of software, make sure you update it by downloading latest version. Happy chatting with Yahoo Messenger and stay updated!