Microsoft Windows* may experience blue screen with the error message IRQL_NOT_LESS_OR_EQUAL when the installation media does not include an integrated service pack.

Intel® 5500, 5520, 1200, and 3420 series server boards support enhanced sleep states, which rely on code found in the service packs as listed below.

• Windows Server 2003* 32-bit and 64-bit requires Service Pack 1
• Microsoft Small Business Server 2003* requires Service Pack 1
• Windows XP* 32-bit requires Service Pack 2

Workarounds

1. Temporarily change BIOS settings:
   1. BIOS > Advanced > Processor Configuration, disable Intel® Hyper-Threading Tech, and set Core Multi-Processing to 1.
   2. Install core OS, then install service packs.
   3. Re-enable Intel® Hyper-Threading Tech, and set Core Multi-Processing back to All.
2. Install with media that includes the integrated service pack (slipstreamed).
   Slipstreamed install required for Microsoft* Windows

Operating System:

Windows XP Professional x64 Edition*, Windows Server 2003 Enterprise x64 Edition*, Windows XP Professional*, Windows Server 2003 *

This applies to:

Intel® Server Board S1200BT Intel® Server Board S1200KP Intel® Server Board S3420GP Intel® Server Board S5500BC Intel® Server Board S5500HCV Intel® Server Board S5500HV Intel® Server Board S5500WB Intel® Server Board S5520HC Intel® Server Board S5520UR Intel® Server System SC5650BCDP Intel® Server System SC5650HCBRP Intel® Server System SR1600UR Intel® Server System SR1625UR Intel® Server System SR1630BC Intel® Workstation Board S5520SC