
You can change computer's processor details in this method. If your processor is core-i3, then you can change it as either core-i5 or core-i7. Just a trick.
before changing

after changing

Let's start
- type as 'regedit' in search box

- You will see a window like this

- Click on 'HKEY_LOCAL_MACHINE'

- Now click on 'HARDWARE'

- Click on 'DESCRIPTION'

- Now click on 'CentralProcessor' and click on '0'

- Find 'ProcessorNameString' of right side.Double click on that.you will see a window like this

- Now replace i3 to i5 or i7 as you like and click ok.go to computer properties and see what happened..
enjoy....