Disable in device manager?
Theres a couple of problems with your "no spinning whatsoever" condition.
Windows will try to access the hard drive occasionally on its own for different small reasons, and it will prolly crash if the hard drive is suddenly not responding. Even if there's nothing system related there. The only way around this is to have a hot swappable/pluggable controller. Not likely on your laptop.
Your only real solution is to set the hard drive spin down time to 1 min in the power options.