Windows 8 has been a robust and optimized operating system than windows 7, so there aren’t much tweaks that you could apply to really speed up windows 8.

Note : The guide has been organized into three levels. Level 1, Level 2 and Level 3.

Level 1 – Users who like to keep on their visual effects and settings but would like to tweak their system.

Level 2 - Users who wish to tweak their system but doesn’t want to fully strip windows 8 visuals.

Level 3 - Targets users who prefer to tweak their windows 8 system to the maximum possible extend by compromising the visual effects. (For Systems which have much less Powerful Configuration.)

Before Proceeding, make sure you create a system restore point in windows 8 and if you find yourself messed up with windows 8 settings, follow this guide to reset windows 8 settings to factory defaults

With Windows 8, its now far more easy to get your computer to previous state. You now no longer need to reinstall windows from the beginning to get the settings to factory default.  Reset Your PC option in windows 8 will help you restore the settings to the default.

• Insert the Windows 8 DVD into the drive.
• Open up “Control Panel” from the main Window.
•  Click on ” General ” and you could see the ” Reset Your PC & Start Over ” option on the right pane.
• After Clicking on the ” Get started ” button you will see the following screen.
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• Click on ” Next ” and windows will bring up another screen asking whether you want to remove all the files from all the drives or you just want to remove the files in the drive windows 8 is installed. Clicking on the ” Show me the list of driver that will be affected ” option will show you the drives that would be affected during windows reset process (Applicable only when you choose  ” all drives ” option).
  
• Clicking on ” Only the drive where Windows is installed ” is preferable if you are concerned with the files stored in other drives.
• Now click ” Reset ” option in the window displayed. The Windows 8 reset process would start off and reboot your PC.
  
• The process would take a while and once this process is finished, you’ll be asked to enter the Windows 8 product key. If you are using the developer version of windows 8, you can progress by clicking the ” Skip ” button.