Device installation was prevented by policy.

I am having a problem trying to install a new external USB drive. It's a Seagate Backup Plus Slim Portable Drive 2TB. I don't think it has anything to do with the drive, though. This is the second one that won't install (the other was a WD 2TB drive).

I am on Windows 7 Pro. I have other external USB drives running on this machine just fine. The only difference is that they are 1TB drives.

Here's what's happening:

1) I plug in the new drive.

2) I get this message, "Device installation was prevented by policy."

3) When I look in the Device Manager, it is showing up as "Other devices". When I open it and check the properties, it says,

"The drivers for this device are not installed. (Code 28)
The installation of this device is forbidden by system policy. Contact your system administrator.
To find a driver for this device, click Update Driver."

When I right click and select Update Drivers, I get the message:

Windows encountered a problem installing the driver software for yur device.

"USB Mass Storage Device:

This same USB drive works on my Win 8.1 and Win 10 machines. I saw this happen another time with a USB thumb drive I have but blew it off as a problem with the thumb drive because all my other TD work fine.

Any suggestions?

Thanks,
Jim

p.s. I tried running Microsoft "Launch Fix it.exe" but that stopped running telling me that there was an error running the script so I canceled it.
I also tried running something called "SeaTools for Windows" but that didn't solve anything, either.

That was it! I have no idea how Device Installation Restrictions got enabled.
Thanks a lot!

Jim