Unlike normal laptops Sony VAIO SVP132A1CW has assist button. The assist button is useful in taking you to the recovery and bios opening menu.
Pressing the assist button takes diretly to the menu which looks like this.
From there select bios menu and enter the bios
You can easily change the boot device there and choose for booting via external device such as bootable pen drive,hard drive or external DVD drive.
After that select save changes and reset. The laptop will boot again in the same menu
From here after seetting the preference for boot device press USB device/ optical device and start the boot process for installing windows.