Process: Yahoo.Messenger.YmApp.exe (Yahoo.Messenger.YmApp)
from 
Stardock Forums
Stardock Forums
Yahoo.Messenger.YmApp.exe - General Information
Name:
Yahoo.Messenger.YmApp.exe (Yahoo.Messenger.YmApp)
Publisher
Yahoo! Inc.
Product:
Yahoo! Messenger for Vista Preview
Default location:
%USERPROFILE%\AppData\Local\Yahoo!\Messenger for Vista\Yahoo.Messenger.YmApp.exe
Yahoo.Messenger.YmApp.exe - Description and Recommendation
Yahoo.Messenger.YmApp.exe has been reported as a hack to allow the Yahoo! Messenger Vista version to work in Windows XP.
Yahoo.Messenger.YmApp.exe - Uninstall Techniques