Can anyone tell me how to install Linux in my computer which have Windos...

I would like to improvise on what Pratyustamhankar said in his response. If you want to clean the whole pc and start afresh it is better to format using the boot CD. All CDs don't have the option of installing when the hard disk is formatted. Although they might come up with the installation process when there is already an operating system installed, it is not possible when it comes to installing from scratch. First of all you have to change the boot sequence to CD Rom which is found in BIOS settings which can be accessed by pressing the DEL button while the system is starting. Secondly, there might be first, second and third boot which have to be changed to CD ROM so that the system does not automatically boots from the hard disk. This usually happens when the CD is yet to start loading. Thirdly, save the BIOS settings and exit. It is advisable to put the bootable cd in before rebooting. Now restart. Now, when the pc restarts, so does the CD ROM and it asks to press any key. Press it. It will start loading files to memory. After some time it will come up with all the steps to perform. Just do whichever is applicable to you. If you want to install from scratch you have to format the whole pc starting from the last drive. For example: you first format drive F, then E, then D and lastly C. You cannot do it in reverse. (If you do not do this you cannot install the OS in C: and the system will show that there is already an OS installed). Now you see your hard disk as a complete and unpartitioned space. Now give the proper space per drive and format it to NTFS. You can now install your OS on any drive but usually it is drive C. Once Windows home edition is installed you can install linux from the desktop itself or do the same procedure done for installing Windows Home. But this time choose a different drive(say drive D:) for it will not allow you to put another one on the same drive. After completing everything, restart the pc, go back to the BIOS settings and change the boot sequence( first boot as hard disk or HDD-0 or HDD-1 or whatever name is given to your hard disk) and second boot can be anything, but I keep it as hard disk and the third boot can be CD ROM. Now press F10 or the key specified to save the changes made to BIOS settings and exit. Now the system restarts and you can find that there is a dual boot option and a countdown which gives some time to choose from the OS.

Ok here's how to do it. First we'll install your Windows Home (I guess you are talking about XP). Put the cd in the cd drive and restart your computer. When it starts, the first thing that will be displayed on your screen will be "Press any key to boot from cd". Here you have to press any key. The setup will start. It'll load files on your memory and soon the installation process will begin. It'll ask you to select the drive in which you wanna install XP. Here you can delete partitions (you wanna do this). Once you delete the old partitions, you can form new partitions. This will format your disks. Then just select the partition you wanna install XP on. Let the installer do its job and XP will be installed on your computer. Same way we have to now install Linux. Put cd into cd drive. restart, select partition into which you wanna install, then install...

Why would you want to replace xp pro with the not so good home edition? all the best urban

There is a safe way to have Linux installed in Windows XP or Vista, and have it treated as a Windows program. I did this a few months back. Have a look at a recent article on the procedure involved. http://www.makeuseof.com/tag/how-to-safely-dual-boot-windows-and-linux-with-wubi-installer/ The website gives a better explanation than what I can do here.

so you mean you want to install dual OS on your machine, I installed Windows XP Pro. along with Fedora Core (a Linux distribution) on my old PC, I don't remember very clear about the procedure, but I will try best to recall it.. ok, first, I think you need to re-installed Home XP to replace your currently using Pro edition, right, so I think for this is ok for you to proceed. let's assume that you installed Windows Home, and there're 3 partition/drivers, they are C:, D:,and E:, and C: is your system drive, ok, we don't have to touch it. try to empty the last driver(here is E:) by move all fiels to the D: driver, and make sure the E: driver has capacity large then 4GB. After you cleaned the E: driver, try use some software like(PartitionMagic) to delete the driver, which means release the disk space as unallocated. Ok, here we go, insert the Linux install disk into your CD-ROM, and boot up from the disk, following the wizard, when prompt choosing where to install, choose 'install on disk freespace' some option like that, then everything's should be easy as you install common windows softwares. After you completed the installation, your PC should be re-boot automatically, there will be a Grub menu after the BIOS screen, and their you can choose which Windows or Linux operation system to boot up. The major steps should be like as I can remember. Hope it make sense to you. P.s. make sure to last install Linux, but not prior to any Windows Installation, otherwise, the result will be a disaster.