I have a mouse for both my PC and laptop, but for some reason, only the wireless mouse works on the laptop, and I have to use the wired one with the PC. I hate wires and want to replace it. Since I often have both computers running side by side, to prevent the computers from picking up the wrong input, it would be wise to use mice made by different companys. Do all companys use the same frequency, etc. for their wireless mice? I know there is something called a "KVM Switch" for mechanically switching one mouse between two systems, but I don't think that it would serve my purpose.