Wireless USB

I have three PCs, an HP Omen, an Acer Predator, and another HP. The monitor port is HDMI on the monitor I use. The keyboard is USB, and the mouse is wireless USB. These are compatible with the HP Omen. The other PCs are 15-pin and PS2. I need a hardware KVM switch that will handle all those...

I am facing this problem for a couple of days. I use a laptop and I connect it with an USB wireless dongle. For a few days my internet connection gets slow whenever I connect my pc to router. Not only my internet gets down, everyone connected to the router is also faces same and if I ping...