Format problem

I wanted to format my old Sony computer so I put the boot disk in the A: drive and restarted, typed [b:a328c252aa]format c:[/b:a328c252aa] and it went through all it's computer jiberish with 2%-50%-100% etc done and now it will not work.

I've tried to go into safe mode but it still goes into DOS like windows is not even on the computer. I've tried everything I can think of. I put the windows cd in and it says insert proper disk. I've insterted the old win95 disk that came with the computer and it says the same thing......

Does anyone know how I can get windows back up and working?

Thanks