The easiest way to return to Factory Condition is through the reinstall operation of the Windows operating systems. Start your laptop, then press the F10 or Fn + F10 while the Vaio logo is on screen, and then the recovery operation will start that is actually the Setup of the Windows install. Follow the instructions on the screen, and finish the setup then Windows will start.
Notice that some applications will be installed as well. Some people consider them bloatware, but that's for you to decide if you want to uninstall them or not.
