Originally installed with Windows XP Media Center Edition, but upgraded to Windows 10 Home. Retains the original recovery partition, and the computer set includes the original recovery CD if the user wants to restore the original operating system on the PC. The computer may be slow due to the motherboard and processor’s age and usage of the computer in the last 21 years, but still works. The computer can be used to run games or other software that are not compatible on 64-bit versions of Windows or are only compatible with Windows XP or older versions of Windows.Specifications (according to the parts currently installed inside the computer): 2 TB Crucial MX900 SSD, 4 GB RAM (four 1 GB memory sticks), 2 GB GeForce GT 710 graphics card, TP-Link Archer T6E AC1300 Wi-Fi network PCIe adapter card, Intel Pentium D 830 3.0 GHz processor. 2 optical drives.The monitor, keyboard, webcam, power cord, and speakers, as well the CDs for the Wi-Fi card and the webcam, will come with the computer.