|OK, since I have had no feedback on this, I tried uninstalling these (sort of - see below), and the bottom line is that I still cannot detect the built-in multicard reader (which has a green light glowing). However, I do have some evidence indicating that the item called "Unknown device" in Device Manager is indeed the built-in card reader. |
My plug-in Laser NOW shows as drives in Windows Explorer when plugged either a separate USB port or the USB port of the built-in card reader, and it turns out that it cannot read the SD-HC card. An ordinary SD card works as expected (K Drive). However, when I FIRST tried this after the uninstalling rigmarole, the Laser when plugged into the built-in's USB was NOT showing up as drives (although its red light was glowing), and in Device Manager there was an EXTRA item listed "unknown device". That item disappeared when I unplugged the Laser. I conclude that the OTHER "unknown device" is probably the built-in card reader. Under properties/general it says no drivers are installed for this device (as did the temporary item).
UNINSTALLING USB DRIVERS: I decided not to uninstall the Printed-related one, and attempted to uninstall the other 15. I ran into problems with at least two of the Intel(R) 82801G (ICH7 family) and two of the USB Root hub items, because uninstalling these stopped either or both of the mouse and keyboard. Overall I think I got them all uninstalled, but had to crash or reboot about four times to do this. This is clearly not a recommendable strategy - would be better to know how to work out exactly which one(s) need to be uninstalled.
Upon restarting the computer, you have to wait quite a while before Windows finds the drivers - assuming it does find the drivers.
My bet is that somehow my built-in card reader driver has become corrupted and that Windows must be incapable of finding and installing one. The reader has no obvious brand - but in miniscule writing says "Hi-speed" and "Certified". I have not tried looking inside the computer. Any views, anyone?