Even using an offline full installer of YM version 9 / 10 I still get the same error.Upon checking online I have read some tips on how to fix it and it works completely.(I can't remember the link) so, I must share it to you,here's the solution:
1.Uninstall Yahoo Messenger
2.Download and Install the Microsoft Visual C++ 2008 SP1 Redistributable Package (x64)(a pre-requisite apps on YM's stability)
3.Restart your PC
4.Install Yahoo Messenger again
5.Start YM.Congrats your done!
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