I don't know how this happened but it's back.
I re-installed xp.
Problem was still there.
I started backing up some files with File Scavenger.
I clicked on My Computer to see what I had in a pen drive...BOOOOOOM...my hd was there and fully working!
WEIRD cause it wasn't working even after re-installed xp.
Damn I hate computers, they do "ghost" stuff behind our backs.
And the worse is even pro computer techs can't explain them

So...does anybody know what happened?