To start the computer using the Last Known Good Configuration feature, please follow the steps below
1. Press F8 when the Sony logo appears right after turning on the computer.
2. At Windows Advanced Options Menu, select Last Know Good Configuration (your most recent settings that worked) and press Enter.
3. At Please select the operating system to start, select the operating system and press Enter.
For more information, please refer to the following solutions in Microsoft's technical support website.
Article ID: Q307852
Last Modified: February 18, 2002
Title: How To Start Your Computer by Using the Last Known Good Configuration Feature in Windows XP
Article ID: Q315396
Last Modified: April 9, 2002
Title: How to Start the Computer Using the Last Known Good Configuration