Ports, ports everywhere, but they are either in use or just not the right one. This USB to PS/2 adapter will make USB devices such as mice or keyboards fit into PS/2 ports.
A: No, this will not work. You need a PS2 to USB cable instead.
A: undefined
A: You issue here is that your basic driver set that is park of the Win7 is missing few compatibility features. What you need to do is find the manufacturer drives for your OS and install them. You will see that everything will work then. Look on HP support site the available downloads for that particular HP keyboard.
Q: support for use on KVM type products?
A: Check the ports and interrupts they are taking. It sounds like they are conflicting that way. You can also try moVing your switch to another USB. I have run into that often too. So much that I avoid'd useing any extra switching methods!
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Ports, ports everywhere, but they are either in use or just not the right one. This USB to PS/2 adapter will make USB devices such as mice or keyboards fit into PS/2 ports.

Sanoxy USB to PS/2 Adapter - Breathe New Life into Older Keyboards/Mice. Give your old peripherals a second chance with the Sanoxy USB Type-A Female to PS/2 6-Pin Male Converter, also compatible with older Logitech devices, offering a convenient solution for connecting USB keyboards or mice to computers with PS/2 ports. This compact adapter bridges outdated connections with modern systems so you can keep using your peripherals. Expand Compatibility with USB to PS/2 conversion that connects keyboards and mice to PS/2 ports, Eco-Friendly Solution that extends device lifespan and reduces electronic waste, Simple Plug-and-Play installation with no drivers required, and Compact Design that takes up minimal space and is portable.

StarTech.com USBPS2PC USB to PS/2 Adapter - Keyboard and Mouse - Convert a PS/2 keyboard and mouse to a single USB interface

Composite AV Cable by Mars Devices – compatible with Sony PlayStation, PlayStation 2, and PlayStation 3 for clear audio and video connection.