You have to start your PC with the XP cd-rom install disk, if you have
one.
Then, when you come to the screen with the following option displayed :
To repair a Windows XP installation using
Recovery Console, press R.
Then press [R] to start 'Recovery Console'
When confronted by a prompt asking you for Administrator password - just
press [ENTER]
Once in RC has started - type the following command :
expand x:\i386\hal.dl_ c:\windows\system32\
hal.dll
(where [x:] is your cd drive-letter)
*NB If SP3 is installed - then the command you type must be :
copy c:\windows\ServicePackFiles\i386\
hal.dll c:\windows\system32
....instead, as the files are of two different revision levels
(versions).
Then reboot.
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