Microsoft has decided not to support the Extensible Firmware Interface (EFI) in its forthcoming Windows Vista operating system.
EFI replaces the Basic Input/Output System (Bios) that has been used for the past 20 years. Both technologies give a computer its first instructions when turned on, and allow the operating system to be loaded.
EFI, however, has an advantage over Bios in that it allows for shorter boot times and lets hardware vendors to create device drivers which are independent of operating systems.
Microsoft had initially said that it would support the technology for 64-bit systems, but decided to make the changes because there will be too few 64-bit processors in the market when Windows Vista ships later this year.
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