I agree with user above. You can install own OS version. All necessary drivers, tools and utilities you can find on Toshiba download page -
http://eu.computers.toshiba-europe.com/innovation/download_drivers_bios.jsp
Your notebook has short model number PSL40E so you will find it there. I’ve already checked it.
Your notebook is also supported for Win7 so I strongly recommend you to install Win7 32bit on your L40. I’m pretty sure Win7 will run good and stabile.
If you need some assistance with OS installation or configuration you are welcome.