Windows 8

[gearspeed]

Did you get any errors after installing Yahoo! Messenger? If not, try this.

Go to the Modern UI (press the Windows key) and type "Yahoo" immediately and see if the app comes up in the search results. If it does, left-click on it and it should run the app.

Walang error sir wala rin yung yahoo messenger na program na dapat lalabas sa screen at sa taskbar.
Wala rin sa search pero nandun sa may program files yun nga lang wala yung program sa taskbar at kahit dun sa start menu niya.
Try ko nga yan