If your system is feeling a little sluggish, it may be time for a refresh. In the past you would have to find your copy of Windows 7, back up all of our data, and perform a fresh install to enjoy that back-to-factory-fresh feeling. But now Windows 8 allows you to perform a fresh install from within Windows without losing any data.
In order to perform the refresh, go to 'Settings' and click on the 'Change PC Settings' tab near the bottom. Select the 'General' tab and find the 'Refresh your PC without affecting your files' section near the middle (you may also select 'Remove everything and reinstall Windows' to do a true factory reset). Select 'Get started and press 'Refresh'. After a few minutes your computer will restart and you will have a fresh copy of Windows 8.