Messenger (9.0.0.2034), you will end up with a small installer file which will in turn need to be installed and run to download the full setup files for Y! Messenger setup initiator downloads if you download the partial installer from Yahoo!.You can Download the Latest Yahoo Messenger 9 offline installer here
yahoo
Yahoo! Messenger for Vista no longer available
It seems yahoo has discontinued its Vista Project for messenger.As per latest yahoo blog , its stopped.IT was inevitable perhaps after release of final version of yaho messenger 9.0 which is still a bit unstable and having bugs apart from many improvents compared to version 8………………………………………………..Reproduced from yahoo blog :-“As of today, Yahoo!