What operating systems are compatible with the HP ProDesk 600 G2 SFF?
The HP ProDesk 600 G2 SFF is compatible with Windows 10 Pro 64-bit, Windows 10 Home 64-bit, Windows 8.1 Pro 64-bit, Windows 8.1 64-bit, Windows 7 Professional (32-bit and 64-bit, available via downgrade rights from Windows 10 Pro), and FreeDOS 2.0. HP recommends Windows 10 Pro. (Page 2)
From the official HP ProDesk 600 G2 Small Form Factor Desktop Computer manual, page 2
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