I'm not being condescending but did you join the Home Group on PC2?
I have been trying to use Home Group for awhile but can't get my PC2 to join. I can however print from it because it is just using network and I don't know how I did that, but at least it works.
My printer is so old there is no Windows 7 driver
for it from HP, it uses some generic driver. Sorry I'm no more help. I'll ask for help.