Counter strike demo file problem.

I can watch Cs demos in cs console but i cant find them anywhere in my computer. I searched in cs folder and made a complete search of my pc. There is nothing. I use windows 8 operating system. i think that can be the problem. Any advice and comment is highly appreciated !! thank you in forward..
Answer #1
Moved from Gamez to Helpdesk.
Answer #2
problem solved ., they were hidden in a system hidden folder ., really hard to find though