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Why is it useful to run the utility from a bootable floppy disk or CD rather than from windows?
Wiki User
∙ 13y ago
Windows uses Protected Mode, which (normally) prohibits raw access to a disk drive and other hardware. Also, if a system is infected with a virus, that virus would already be active, and may affect the performance of the utility (i.e. by hiding itself, disabling the scanner, etc). By using a utility that does not need Windows, you can prevent a virus from loading, which allows for a clean scan. Or if the utility needs direct hardware access, it can do so without needing elevated privileges and/or special drivers.
Also, some motherboard functions, such as a BIOS flash, can only be performed in "unprotected mode", which is the BIOS's way of preventing a virus from infecting the BIOS (which would render the virus invincible, and/or completely damage the computer beyond repair).
Wiki User
∙ 13y ago
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