that requires the cd

When I start up my laptop, the screen immediatly says Windows could not start because the following file is missing or corrupt:
\windows\system32\config\system
You can attempt to repair this file...

I had the same problem where it said limited or no connectivity even though i was connected to the router. Luckily I found a threat that said to use winsockxpfix. I downloaded it and installed it...

How do you erase the hardrive if we don't have access to anything on the computer?