Uninterruptible Power Supply Goes into Battery Mode During Windows 2000 Installation

ID: Q238860

The information in this article applies to:

Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server

SYMPTOMS

When you install Windows 2000 on a computer that has an uninterruptible power supply (UPS) attached, the computer may go into Battery mode.

CAUSE

This behavior occurs during Setup when the serial enumeration driver (Serunum.sys) attempts to detect what exists on the serial ports. The UPS is started when the driver touches the serial port.

RESOLUTION

To work around this problem, disconnect the serial cable from the UPS during Setup. The problem does not occur after Setup is finished.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Windows 2000.

Additional query words:

Keywords : kbhw
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbprb