You are looking for a product known as disk imaging software. Some
popular examples are (in alphabetical order):
Acronis True Image
Norton Ghost
Paragon Drive Backup
Terabyte Unlimited Image for Windows
A disk image is, basically, an exact copy of a hard disk (or a disk
partition.) You can use an image to do what is called a 'bare metal
restore.' This means that the entire disk (or partition) is replaced by
the image. It's like going back in time.
Disk imaging has a learning curve, but it's a very worthwhile investment
of your time.
You will find it quite inconvenient to store disk images on a DVD. An
external hard drive or network drive is a much better choice.