There are 2 main reasons for which you absolutely must protect the system BIOS with a password (see the documentation of the system's motherboard for details):
1. If the BIOS is not protected, the user can change the system date and time when booting. If the Enable system time monitoring option is not ON in PCTW or if the PC is not connected to the Internet, the user will be able to cheat.
2. If the BIOS is not protected and if booting on a CD is allowed, the user will be able to boot the system on a CD including some utility allowing to reset passwords or to change the type of an account (and therefore, to change a limited account into an administrator account). There are several such utilities available for free on the Web. So you must exclude the possibility of booting the system on a CD and then lock the BIOS settings by specifying a password. These operations are described in the system's motherboard manual.
Equipe Support PC TimeWatch