Product Name (Model Number): HP ProDesk 400 G5 SFF Made in Tokyo Model Legally updated to Windows 11 Pro (Possible because it's a PC with an 8th generation CPU) Updated to the latest 25H2. CPUs older than the 7th generation are not compatible with Windows 11 requirements! Many items are listed that have been unofficially upgraded to Windows 11 using workarounds on PCs with 7th generation or older CPUs. *Major updates are not possible on these PCs; please be careful when purchasing! CPU: Intel(R) Core(TM) i3-8100 @ 3.60GHz Memory: 8GB Storage: HDD 500GB Optical Drive: DVD-ROM Internal CMOS battery replaced Various drivers and BIOS updated Only the main unit will be shipped. *Windows 11 PCs with 7th generation (CPU 7000 series, G3 or earlier) or older CPUs cannot receive major updates because they do not meet Microsoft's requirements. It is important to choose a PC with an 8th generation (CPU 8000 series or later, G4 or later) CPU. Form Factor: Small Form Factor OS: Windows 11 Pro Thank you for viewing.