My shared documents folder has been renamed somehow to "documents", and i can't access it anymore! I get this message:

I get the message no matter if i'm logged in as admin or power user or whatever... Searched for viruses and spyware, and it was all clean. I haven't installed anything new for a while, just normal Windows Updates and games from trusted publishers.
ALL of my digitals pictures were in here, so other users could see them... now they seem to be al gone
Can anyone help me? I'm lost
Specs: WinXP pro SP2
Dell inspiron 8200, Pentium4 @1.8Ghz, 640Mb Ram...