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The specs said. Display Emulation Technology provides the EDID support for Windows 7. You need to look for devices which state they support windows 7 IOGear GCS632U 2-port compact USB kvm switch w/built-in Not a windows issue as long as you are using devices which support win 7 even a little cheapo (30.00) IOgear works. It's more stable in the sense that Windows doesn't have to constantly re-recognize your USB devices every time you switch ports - like is required with most standard switches. I've heard some people complain about USB issues when switching back and forth with Windows 7, and personally I haven't seen it, but if that's what you experience then yes, you'd probably need something providing DDM. Some newer KVM models that support all-time full DDC allow that communication to take place on all ports, regardless of what port is currently active. Regular KVM models will interrupt that communication when you switch ports. DDC is the Display Data Channel, and that's how the computer is able to communicate with the display. In these cases, you'll need to look for a KVM that provides full DDC/EDID communication.

Many people only experience video problems when switching back and forth with a regular KVM, and that's because Windows 7 will frequently try and communicate with the monitor, and if you're on a different KVM port, 7 will get the impression no monitor is connected and then stop sending video signals, or since it doesn't know what if any display is connected, it will change the resolution to an ultra-compatible 640x480. Richard, I'm not sure if you're still in need of an answer, but it might partially depend on what issues you're experiencing with the existing KVM switch.