We help IT Professionals succeed at work.
Get Started

How do I force Windows XP to use the multiprocessor HAL?

jv01ls1 asked
Last Modified: 2008-08-06
I just upgraded hardware from a single processor motherboard to a p4 w/hyperthreading.  Since it is still a single processor, Windows XP is still using the single processor HAL even though both logical processors are listed in device manager.  

I tried booting with the XP cd and using the recovery console to manually rename the hal.dll and copy in the halmacpi.dll from c:\windows\servicepackfiles\i386 into c:\windows\system32 and renaming it to hal.dll.... All that accomplished was windows not even getting started to load... it doesn't even bring up the blue progress bar.  

That has worked with Windows NT in the past if I did this type of situation (I either moved the drive to another PC to copy the files, or used a third-party program that can read NTFS in DOS).  

What else can I do?  I also tried manually updating the driver in device manager and pointing it to te acpi.inf in c:\windows\servicepackfiles\i386.  This did not give me the option to choose the multiprocessor HAL.  

Thank you for your time!
Watch Question
This problem has been solved!
Unlock 1 Answer and 19 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant

An Experts Exchange subscription includes unlimited access to online courses.

Get Started
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE