Sony PCV-R545DS VAIO Computer User Guide (primary manual) User Manual page 34

Insert the Sony System Recovery CD in the DVD-ROM drive.
Shut down your computer as described in "Shutting Down Your
Computer" on page 14.
Wait 30 seconds and turn on your computer.
Click OK to signify you have read and accept the Microsoft End-User
License Agreement.
When the System Recovery menu appears, follow the on-screen
instructions to complete the recovery process.