Iria

"Microsoft did well releasing Service Pack 1, but somehow they forgot end users when they introduced a very restricted module of driver signature enforcement. In laymen’s terms, all drivers and system files must be digitally verified or they cannot run when using both 32-bit and 64-bit versions of Vista. In the past, it was possible to turn that feature off; but due to new kernel security updates, it is impossible to turn it off without degrading security and stability of your operating system or putting your master boot records in risk by using other software alternatives.

Pressing F8 every time on boot up can be a serious pain in the ass and frustrating to those that miss the time window available to press F8 during start up. Others have found workarounds, but most of them are too risky and may trash your master boot records and some others were too complicated for the average end user to perform, at least until now - thanks to our latest tool."
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Source: NGOHQ