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I cannot install my SaffirePro24 ( Or SaffirePro40 ) because Vista 64 says the driver is “unsigned”…

Re: Disable driver signing in Vista 64bit
Press F8 on startup to get to the safe mode boot menu. One of the options is to allow unsigned drivers. This will get it installed. There is no way to make this permanent. Every time you want to use a program that needs an unsigned driver you have to reboot, press F8, and enable this option.

Thanks to:

Kerry Brown
Microsoft MVP