Windows Vista Randomly opens programs

[rafiki]

As the title suggests, Windows Vista is randomly openning two different programs for no reason.
The first program being Windows Media Player, the other being Acer Arcade Deluxe (Came with laptop).
There is know reason why it should happen as it doesn't happen all the time and nothing changed on my laptop when it started happening.
I did a quick Google search but nothing resolving the situation.
Anyone here had this problem or know how to fix it?
Thanks.
Rafiki.

[abduraooft]

Try hijackthis (http://www.download.com/Trend-Micro-HijackThis/3000-8022_4-10227353.html), to see if any malicious program running behind.

[ashton]

To exit that app, run (Note that "/Close" is case sensitive):
C:\Program Files\Windows Media Player\wmpnscfg.exe /Close
To make it not run again, open the registry key
HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Preferences\HME and set the
DWORD value DisableDiscovery to 2. If you had a UPnP Media Renderer or
control point on your local network, you'd also be able to disable it by
right-clicking on its taskbar icon (which only shows if it finds a UPnP
Media Renderer or control point) and choose "Disable Future Notifications".
As to why it starts running when you've disabled media sharing, that's a bug
in WMP 11 Beta2.
Hope this could help.