Why does my System drive make crunching noises during Vista start up and for about 2 minutes after desktop loads, its continues to crunch, then it stops. What exactly is going on? I would assume it sounds like its loading stuff, but no programs should be loading... it makes me feel like it takes forever for the computer to start up. Whats the noise about? Just curious.
One cause (and usually the culprit) is superfetch, especially during start-up. Many have disabled and noticed no performance decrease.
Before following the below steps, you might want to read up on superfetch before disabling it. It is reversable though.
Click on the Start orb and type services into the Start menu search box. Next open services and scroll down to Superfetch and double click to open. Next to "Startup type" in the drop down box select "Disabled". Apply the change and close out of Services. You can also disable "Windows search" in services to reduce thrashing even further.
Once you have close out of all open windows reboot your pc and see if the disk thrashing still occurs.