Thank you for viewing. ■ Product Description SONY VAIO SVF143/153 series Recovery disc created by us from the manufacturer's original After formatting the hard drive (SSD) or when replacing it, you can restore the contents of the hard drive (SSD) to the factory default state. You can also create a recovery partition within the SSD, which is convenient for later use. Applications and settings that the user has installed, such as Office, will be deleted during recovery, so please prepare to reconfigure or reinstall them beforehand. Windows 8.1 Home 64bit only. Other editions cannot be installed. This is a set of 5 DVDs created from the original disc. This model can still be used by upgrading to Windows 10 or 11. Additional Information Clean installation and upgrade confirmed on Windows 11 24H2, Windows 11 unsupported models [3rd/6th generation]. Upgrade confirmed from Windows 10 22H2 19045.4046 and Windows 11 23H2 22631.3155 [with inheritance]. Please check YouTube or other sources for update instructions. There are detailed websites available, so please check them. How about it for initialization, recovery, or as a spare? This product is no longer sold by the manufacturer, so we are waiting for those who are having trouble. Included items Only 5 DVD ROMs created by us from the original disc. Thank you.