It is a driver signature issue and I tried all of that. I had to disable secure boot on the laptop I was using and I still could not get the driver to install. Maybe it's the crappy Samsung laptop provided by my company or the fact that it was upgraded from 8 but all I know is I could not get it to work.

It should be obvious, but for the sake of clarification and to eliminate any/all confusion: You do realize that if your account type is standard user, then the right click, run as admin will not work, right?
The reason why that option is there is so I, as system admin, can remote into your PC, and install/execute something that you as user couldn't.

But I don't want you in my PC..... Besides, there's not enough room for both of us...

Just a guess here, but most computers today have over 4gb or ram and as such are running a 64-bit version of windows. Maybe what is happening with the driver is that it is only for 32-bit windows and won't install on a 64-bit system? I've run into this issue with other older hardware in the past and now I keep a Windows XP virtual machine on my laptop that I can fire up when I need to manage some ancient piece of hardware that won't play nice with modern versions of windows for whatever reason.

I am running in to the same problem, even with secure boot turned off. Did you ever figure it out? I had to boot up an old Win 7 computer and run it in compatibility for XP mode. I would like to use my latest laptop for everything.

I'm running CCP with Win 10 64 bit on a Surface Pro Laptop.

As far as I ever knew you can’t do an MSC400 with anything past XP. If someone here is doing it I’d like to know right away because my antique laptop is DYING and all I’ll have soon is Win7!

On CCP with Win10 and the MX880 driver, I’d suggest calling URC support and they should be able to get you going.

The key to downloading to the MSC-400 isn't specifically the operating system, it's whether that operating system is 32-bit, or not. You can download to the MSC-400 under Windows 10, however, it must be the 32-bit version of Windows 10. The reason is there has never been a 64-bit driver for the now long outdated MSC-400. I've setup a special installation of 32-bit Windows 10, on an older machine, just so I can continue to update my MSC-400.

I did get the MX880 driver to load on a Win7 laptop that was upgraded to Win10. My main Win10 laptop loaded the driver with dig sig turned off, but it blocked from being used. Grrr. "The driver for this device has been blocked from starting because it is known to have problems with Windows. Contact the hardware vendor for a new driver. (Code 48)"

Okay! I followed my own motto "when in doubt, re-boot." Wiht digital signatures turned off, I uninstalled the driver and its software, then reinstalled the XP driver. This time it worked and I Windows does not block me from using that driver. Yeah!