UPDATE: STREAMING MUSIC FROM WINDOWS 7 PC.
So, I read the manual, and from what I read it stated that you "CAN" stream music from your PC as long as you create shares with Windows Media Player. I have a Win 7 PC, with Windows Media Player 12. I created a folder "MUSIC" with music files, and created a share by using the following steps:
1) Open Windows Media Player
2) Left Click on FILE, top left corner
3) HIGHLIGHT Manage Libraries
4) Left Click on MUSIC
A small window will pop up.
5) Click on ADD
Another window will pop up.
6) Locate your MUSIC FOLDER
7) HIGHLIGHT your FOLDER
8) Left Click on INCLUDE FOLDER
Now, your SC-1222-K should be able to have access to your MUSIC folder PC, and it should play your music. If you can see your music files, but your AVR won't play your music file when you select them, THEN YOU WILL HAVE TO DO THE FOLLOWING:
1) Open Control Panel
2) Under Network and Internet click on CHOOSE HOMEGROUP AND SHARING OPTIONS.
NOTE: I do not have HOMEGROUP enable since I do not use it. However, some of you may have this enable, which should be fine.
3) Click on CHANGE ADVANCED SHARING SETTINGS
4) Under the 4th option MEDIA STREAMING has to be enabled or set to ON.
Once you enable / turn on Media Streaming, a small window should appear, which should have all of your devices connected to your network. Your SC-1222-K should appear in this window.
Make sure that the SC-1222-K permission is set to "ALLOWED"
After you complete these steps you will be able to access and play your music files. I hope this helps everyone else who had issues like I did.
HERE ARE SOME PICTURES. FOR THOSE OF US WHO DO BETTER BY VISUALIZING WHAT YOU ARE SUPPOSE TO DO:
THESE PICS ARE FOR CREATING THE MUSIC SHARE FOLDER
THESE PICS ARE FOR TURNING ON MEDIA SHARE



Note: I am still working on being able to access my UnRaid server from the SC-1222-K. It appears that I will have to install a Media Server Plugin in order to accomplish this. If I am successful, I will post back with directions!
Edited by GusGus748s - 3/18/13 at 10:13am