Setup will now inspect your computer hardware and configuration.

Setup now prepares your computer for install.

From this menu press enter  not R to begin the repair install.

 Then you  will get  the 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 your system

 then it willl prepare files that are needed to be copied

Setup will now initialize your XP configuration.

after this

Setup will  need to reboot your computer.

Boot will recognize that the XP CD is in the drive  dont press any keys at this point

.Now Windows  begin to load. Sometimes  windows will be finished the repair

Windows will continue to install

Windows setup will now finish

Now restart windows    xp again

Boot will recognize that the XP  is in the drive dont touch any keys

Windows will now adjust your resolution, click ok

Windows will now apply changes this might take a while

then you will get the  windows  xp welcome screen

then your  desktop will appear   the repair  is   done   Good Luck