>Vista has this service turned on by default called “Superfetch”.What this does is keep track of user patterns like which are the most commonly used applications and on startup,load these frequently used applications first for logged in user.
Just like all the Windows services,this too can be turned off or on if you want to explore the performance difference of your Vista system.
Let’s take a look at how to turn this service off from command prompt.
Go to Start > Run > cmd
To turn the service off,type :
net stop superfetch
And to turn it back on :
net start superfetch
Feel free to experiment the enabling and disabling of this service and check if it makes a difference in speed of Windows Vista.