Very recently, I noticed this process in windows task manager called YahooAUService.exe after some searching I got to know that this process is associated with yahoo messenger. This process is meant to prompt automatically to download an update once one is made available. This cannot be turned off under yahoo messenger settings, and is annoying when you don’t wish to upgrade, or specifically downgraded and the pop-up keeps on coming back.
By default yahoo messenger is stored in C:\Program Files\Yahoo!\SoftwareUpdate – best way to remove it is to go to the process folder location and uninstall yahoo updater, follow the procedure below to know how to do it.
1. Right click on the process in task manager, and select open file location
2. Once the folder opened, click the Uninst_AutoUpdater.exe to remove yahoo updater permanently.