Some time ago while roaming the web I stumbled on something that has proven to be very helpfull indeed.
These are (free) guides written by Koroush Ghazi about the windows os's and other.

Starting from the very beginning to an advanced level these guides have proven to be an easy read and are imho very thorough.


Link to the:

windows os guides.
main page.

I would recommend these to anyone who feels the need to expand his/her knowledge on tweaking or just wants to understands more about your pc.