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SUPPORT COMMUNICATION- CUSTOMER ADVISORY

Document ID: c03763066

Version: 1

Advisory: HP Z420, Z620, and Z820 Workstations - Unknown Device Showing in Device Manager with Windows XP

Notice:: The information in this document, including products and software versions, is current as of the release date.The document is subject to change without notice.

Release date : 14-May-2013

Last updated : 26-Jun-2013

DESCRIPTION
If a user installed Windows XP Operating System on HP Z420, Z620, or Z820 workstation, the Device Manager may show an 'Unknown Device' with Device ID: ACPI\ACPI0004\CPUSCK0 (and CPUSCK1 on dual-CPU systems).

sourceInformation

SCOPE
Information in this document applies to the following:
Systems:
  • HP Z420 Workstation
  • HP Z620 Workstation
  • HP Z820 Workstation
Operating Systems:
  • Microsoft Windows XP Professional Edition
  • Microsoft Windows XP Pro 64-Bit Edition
RESOLUTION
Perform the following procedures to resolve the issue.
NOTE
Use the Arrow keys to select various menus, menu items, and to change values (unless otherwise specified).
  1. Start or restart the computer.
  2. Press the F10 key when the F10=Setup message appears on screen.
  3. Select Advanced > Bus Options > Legacy ACPI CPU Tables > Enabled.
  4. Press the F10 key to accept the change.
  5. Select File > Save Changes and Exit.
  6. Press the Enter key.
  7. Press the Enter key to save the changes and exit the F10 Setup utility.

Hardware platforms affected : HP Z420 Workstation, HP Z620 Workstation, HP Z820 Workstation

Operating systems affected : Microsoft Windows XP Pro 64-Bit Edition Microsoft Windows XP Professional Edition

Software affected : Not applicable

Support Communication Cross Reference ID : IA03763066

HP Inc. shall not be liable for technical or editorial errors or omissions contained herein.The information provided is provided "as is" without warranty of any kind.To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restorationThe information in this document is subject to change without notice.HP Inc. and the names of HP products referenced herein are trademarks of HP Inc. in the United States and other countries.Other product and company names mentioned herein may be trademarks of their respective owners.

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