Hello,

I have two nearly identical PCs running Windows 10 connected to a KVM switch.

P300 Thinkstation
M93p Thinkcenter

However when I connect a KVM switch with HDMI/Mouse/keyboard via USB, Windows 10 installs three mouse drivers and one keyboard driver.

Then when I try to use the mouse on either machine the screen focus goes all over the place switching between screens such as the desktop, start menu and sometimes other screens minimized at the task bar.

The mouse when connected via the KVM is totally unusable.

I'm trying to return the KVM and the seller want's me to try a few things such as switch to another mouse. However I currently don't have another wired mouse at least that I can find from storage. I should have some wireless mice, but am unable to remember where I stored them.

I don't believe the problem is with the mouse as I've since found another KVM, a used StarTech 2 Port HDMI KVM Switch SV231HDMIUA and the mouse and keyboard work perfectly with the StarTech KVM.

The KVM with problems, the keboard and HDMI video switch ok, but when connecting a mouse to the KVM the desktop becomes from each PC becomes unusable.

It appears the problem with the mouse is because when the problem KVM is connected to the PC's USB port Windows 10 installs three mouse drivers instead of one apparently causing problems with mouse control, etc.

From the Device Manager

* While the KVM USB is connected to the PC's usb.

Keyboards
HID-keyboard device
HID-keyboard device

Mice and other pointing devices
Hid-compliant mouse
Hid-compliant mouse
Hid-compliant mouse
Hid-compliant mouse

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* When the KVM USB is disconnected from the PC

Keyboards
HID-keyboard device

Mice and other pointing devices
Hid-compliant mouse

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2 Port USB2.0 HDMI KVM Switch Switcher Cable For PCs Dual Monitor Keyboard Mouse | eBay