HELP (Toshiba TE2300)

Hello,
I have a toshiba te2300 laptop and everytime i try to log on it comes up with these messages: (Services.exe - Application Error: The application failed to initialize properly (0xc0000005). Click on OK to terminate the pplication.) Then when i press ok the same message pops up but for the "lsass.exe" file and im left with a blank screen. All i would like to know is how do i reset my laptop to factory settings without logging on, the laptop is locked to a company so my movements are restricted. PLEASE HELP (windows xp professional)

THANKS GUYS.