My computer is viturally inaccessable

I start up my computer, click my acount name (this is in winXP btw) and it starts up, besides the extreme laggyness while its starting, I realize I cant open anything.

When I mean anything, I mean everything. I cant open icons on my desktop, I cant open icons in status bar, I cant open incons in my quick link bar, I can open programs in my start menu (and if I do they will freeze and not work within 5 minutes of the opening)

Now my family has a LAN network (I know it's improper to say it that way, but it sounds better) so all 3 of our computers are linked (access each others files from any computer) Now my computer is hardwired to the Modem and i'm trying to access my files from my parents computer. I go to the website where the linking is, and I click my name on the list, and click access shared files. When I do this it takes a moment to load and i'm left with a message telling me my computer is not accessable and It could not be reached.

Now does anyone have any idea how to unfuck my computer/get my files? I dont mind dumping the harddrive, but i'd rather not. If I have to i'd atleast want to get some files off.

Worst case, all goes, I get nothing <_< lets not get there yet though :mellow: