Everything is hidden in c: drive

I have installed windows xp on c: drive. I cannot see any folder or
file on this drive because all of them are hidden. I have checked
tools>view >folder options, everything is normal there. I can access
all these files by typing their address in address bar (i.e c:/program
files) . Whenever I create a new folder in c: drive, it hides
automatically as well. All other drives are working fine.
Plz help.