The error "0191 System Security-Invalid Remote Change requested." occurs at power-on.

The following ThinkPad System running Microsoft Windows XP may be affected by this symptom:

• ThinkPad R61 (14.1inch widescreen with IEEE 1394)
• ThinkPad T61, T61p

Update system BIOS to Version: 2.20-1.08 or later (Release Date: 2008/07/01 )

BIOS Update Utility