If u have ur windows XP installation disk
- Boot into disk
- Run repair install
XP Repair install
Please read carefully and make sure
you followed the warning links before
initiating the Repair Install. You can
print a text version for reference.
repair.txt
Boot the computer using the XP CD. You
may need to change the boot order in
the system BIOS so the CD boots before
the hard drive. Check your system
documentation for steps to access the
BIOS and change the boot order. When
you see the "Welcome To Setup" screen,
you will see the options below This
portion of the Setup program prepares
Microsoft Windows XP to run on
your computer:
To setup Windows XP now, press
ENTER.
To repair a Windows XP installation
using Recovery Console, press R.
To quit Setup without installing
Windows XP, press F3.
Press Enter to start the Windows
Setup. Do Not choose "To repair a
Windows XP installation using the
Recovery Console, press R", (you Do
Not want to load Recovery Console). I
repeat, Do Not choose "To repair a
Windows XP installation using the
Recovery Console, press R". Accept
the License Agreement and Windows will
search for existing Windows
installations. Select the XP
installation you want to repair from
the list and press R to start the
repair. If Repair is not one of the
options, END setup. After the reboot
read Warning#2! Setup will copy the
necessary files to the hard drive and
reboot. Do not press any key to boot
from CD when the message appears.
Setup will continue as if it were
doing a clean install, but your
applications and settings will remain
intact.
http://www.michaelstevenstech.com/XPrepairinstall.htm