Windows Vista Advantages
SuperFetch prioritizes the programs you’re currently using and adapts to the way you work by tracking the programs you use frequently, at what times of day that programs are used and intelligently preloading these into memory.
So what so great about this you ask. If your computer is struggling to accommodate other tasks while your antivirus or backup utility or even Photoshop image processing is running, just plug in a USB 2.0 thumb drive to boost the memory and you can literally enjoy a performance boost instantly.
As for me, the reason I upgraded my desktop RAM to 3GB recently is to take advantage of this feature.
Those I/O hangs will be a thing of the past as Vista is engineered to avoid them and the interference from rouge processes. Yes no more system hanging and pressing the reboot button finally.
From the security department, one of XP’s biggest security problem is that it promotes everybody who wants the ability to run a vast number of programs and conduct common activities as an Administrator. As a result anybody, including a malicious program that has the admin privileges is able to wreak havoc and exploit your system.