Wifi network issue

Hi all,

I have a PC hard-wired to my router and a wifi connection to my laptop.  The laptop can "see" the PC when I open Explorer.  Until recently, I could call up and edit files located on the PC on to the laptop, but recently, have been unable to do this.  I can see the directories for My Videos, My Pictures, My Music and My App Data, but not My Documents.

Can someone please tell me where to look for the changes I appear to have made that caused this?

Thanks,

Ian