How to speed up system boot time and the performance

Disclaimer
You are using this guide at your own risk. I don't take any responsibility for any problems.
Warning
Before you will do anything please backup your system.
How to do backup? Check the topic created by CherylG in the below link:
Custom 'Recovery' Options
If after performing changes which are suggested in this guide, will be a problem with the operating system then, you will have possibility to restore the system to its original state.
Recommendation
When after adjusting the system you will realize that everything is working faster and better then before, backup the system again. Why? It's always good to have an Image of well tuned system.
Table of Contents:
A Increase the Windows 8 performance
B Increase the Windows 7 performance
C Increase the Windows Vista performance
D Increase the Windows XP performance
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A Increase the Windows 8 performance
01. Check the below link:
         Improving System Performance without Adding Memory (Windows 8) - the HP document
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