Have you tryed removing it? I read up on it and some people said they cant remove it so....
C:\Windows\DownloadedProgramFiles\UWA5PLP_0001_072 1NetInstaller.exe would be the place it would be I think..
I assume you already looked in Control Panel -> Add/Remove programs, and did not find it?
You need to disable it from starting up when you log-in. One good way is to download and run Autoruns from: http://www.sysinternals.com/Utilities/Autoruns.html
Use it to scan your system. Use the "Hide Micorsoft Entries" option to reduce the list, then un-check anything that pertains to that program. Then reboot and it should be gone.