How can I install CD rom?

The advantages of a recovery CD can be had, without the disadvantages, by using disk imaging software such as Norton Ghost, Acronis True Image, or others to create a bootable image of the machine in the desired initial state. For example, a user can install their own licensed copy of Windows XP, install all device drivers for their hardware, install other desired software, and possibly most useful, configuring the system with all the users settings for email accounts, passwords, etc. This does require the purchase of software, and the limited expertise necessary to install and run it. It has the advantage that the process is not dependent upon Microsoft Windows; a machine running almost any operating system can be imaged. The disadvantage is if you make changes to your system or settings in any way (i.e. you change e-mail accounts, you replace some hardware, and so on) you'll either have to produce a new recovery disc, or remember to re-perform all those steps after using the recovery disc.