07.03.09 - tathor - Satellite P100 models may lock up after the memory has been upgraded to the maximum capacity of 4GB. Update the computer's BIOS to version 4.30 or higher to fix this problem.
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/downloadDetail.jsp?soid=2021324&pf=true Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.