Hi Sameer,
You can easily create a bootable iso file from Windows DVD or CD. The only thing you need is that good software to create a copy of the DVD into an ISO file. It's pretty easy and Just you have to follow the given steps.
- Download and install Imgburn
- Open Imgburn and Click on Create image from DVD.
- Now configure the advanced and its done.
- After, sometime your ISO file will be created.
And Done!
Thanks