Welcome to Microsoft's Windows XP Professional X64 Repair Install step by step. This will give you an idea on how to do this when and if the time arises for you to either reinstall the operating system, install for the first time or upgrade your present operating system. This install guide is fully graphical and will take you through each step of the installation. 

What you will require to do this walkthrough is 

1. A Computer that has a 64 Bit Processor

2. A Windows XP Professional X64 CD

3. A Computer with CD-ROM access

To start this Windows install. First check that the first boot device in your system BIOS is set to the  CD-ROM Drive.

( To find out how to access the BIOS please refer to your motherboard manual or the manufacturer of your Laptop. (The system bios can usually be entered on boot, usually by pressing the F1, F2, F8, F10 or DEL key. Make sure you save the settings before exiting))

If you are unsure or don't want to enter the BIOS then just test the computer by putting the CD-ROM in the drive and reboot your computer. This is the recommended way to install windows.

  

To begin insert your Windows XP Professional X64 CD and reboot you computer. A message "Press any key to boot from CD....." will appear, press the space bar to continue.

Setup will now inspect your computer hardware and configuration.

Setup now prepares your computer for install.

From this menu press "ENTER" to begin the repair install.

Windows XP License agreement, read, and if you agree press "F8" to continue, press "ESC" if you disagree. If you disagree setup will finish.

 

Now select the operating system you wish to repair, if as in most occasions there is only one, the just press "R" to continue.

Setup will now make some checks on the system.

and then prepare files that are needed to be copied.

Setup will now initialize your XP configuration.

Setup now needs to reboot your computer. Press "ENTER" to save yourself a 15 second wait.

Boot will recognize that the XP CD is in the drive, DO NOT press any keys, let setup bypass the CD boot.

Windows will now begin to load. On some occasions Windows will be finished the repair, if so it will go straight to Part 7. Which is the part where you arrive at the desktop, otherwise the install will continue. 

The repair process continues.

Windows will continue installing.

Windows setup will now finalize.

It is now time to restart Windows XP again, press "ENTER" to speed up process, otherwise Windows will do it itself in 15 seconds.

Boot will recognize that the XP CD is in the drive, DO NOT press any keys, let setup bypass the CD boot.

Windows will continue loading.

Windows will now adjust your resolution, click "OK" to continue.

If you are happy with the changes, click "OK" otherwise press "Cancel" to return to the old settings

Windows will now apply changes. Be patient.

Windows "WELCOME" screen.

and finally the Windows XP Desktop. Windows is now installed.

As you have repaired Windows, there should be no drivers to install. Your files should be safe, but you should always check out device manager for unknown devices, likely items are Network Cards, Sound Cards, Printers, Scanners, Graphics Cards, Digital Cameras, plus  any other item you have.