Come to think of it.
Plugging in the R8 alone won't make any difference of course.
You have to set the R8 to either audio interface mode or card reader mode by pressing the USB button on the R8 itself.
But I'm guessing you already done that.
Yes, I did. :-)
Progress Report: I did some further testing with the USB problems. The supplied cable *is* different. It works in some ports and not others. A replacement cable worked in all of them. (That's typical of every USB device that I own - it works over here, but not over there.)
What I get on plugging in is that with two of the ports, the R8 appears in Devices and Printers as "Zoom R8" and with the other two, it appears as USB Composite Device.
When I plug it in to any of the ports, assuming that the R8 is completely uninstalled, Win 7 doesn't ask for a driver location, but tries to install its own. I turned off the internet so it wouldn't look in Windows Update, and it seems to be trying to install a generic USB driver - the result is a driver icon with a red X.
The Zoom shows up in Device Manager>Sound as two entries, Zoom R8 and Zoom R8 Driver.
If I use Device Manager (or other method) to update the driver and point it at the unpacked files in Data1, Win 7 says "The best driver software for your device is already installed." and it won't do any more. If I let it search on the net, it says the same thing. If I right-click the driver and select Properties, it says that it's a Generic USB Device and "This driver cannot start (Code 10)".
Code 10 means that one of the driver installation steps is causing an error. Microsoft says this about it: "The most common resolution is to update the drivers." Yes, yes, thank you, Microsoft.
If I uninstall the R8, then I can't do anything because there's nothing to work with. It looks as if I need a way to install the Data1 files as a driver without Win 7 interfering and loading a generic driver instead. There must be a way to force Windows aside and make it do what we want.
By the way, Henky, I love your website. I admit that I don't know much about electric music, being a traditional/renaissance/baroque acoustic guitar kind of guy, but I do have some favourites among electric bands.