bogdanb,
What model Toshiba do you have?
It should be possible to set the BIOS to enable booting from a USB Key. If this is the case please do so and boot from the PCDR MUD. This will allow you to run the DOS product.
Service Center 7 has been released. This offers a parallel port lock as well as the USB lock. The upgrade policy is very nice, contact sales@pc-doctor.com for details.
-Fred