needs to reinstall a file into windows xp

[Guest]

using windows xp I have lost or corrupt <windows
root>system32\hal.dll. windows says to reinstall a copy of
this file but I have not a clue how to help even using the
windows restore on the cd it just repeats the message help

 

[Kelly]

HAL=Hardware Abstraction Layer

How to Move a Windows XP Installation to Different Hardware
http://www.jsiinc.com/SUBJ/tip4800/rh4839.htm

Situations in Which Windows May Not Start in Safe Mode
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q199175

How to Troubleshoot Hardware Abstraction Layer Issues
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q237556

More information and a workaround here:
http://www.kellys-korner-xp.com/xp_haldll_missing.htm
http://www.kellys-korner-xp.com/xp_h.htm#xp_hall.dll