Mayayana wrote:
"Paul" wrote

| Possibly USB3? I'm not sure whether those will work
| in XP. But I haven't actually tried. I do have a later
| model Sandisk that works in XP32 and Win7-64, but
| doesn't show on my Win7-32 laptop. I have no idea
| why. My older Sandisk tick works fine on all of them.
|
|
|
| My NEC USB3 card works fine under WinXP SP3.
| I have several good USB3 sticks, and a few more
| USB3-in-name-only sticks, and all are detected
| and function.
|
The reason I wrote that was because my current
computer, which I built, has both USB2 and 3 ports, and
the USB3 don't seem to work. But I admit I haven't
spent time checking out the problem as I just don't
need USB3 and I don't often use USB sticks. Mostly
it's just an occasional plugging in of a camera, along
with a USB mouse.

I also wondered about the variations. Like my Sandisks
with white slides that work everywehre while my Sandisk
with a red slide doesn't work in the Win7 laptop. Weird.

It sounds like you're saying the quality control
and standards are just not there for sticks.

You could start with the BIOS page that controls
USB and see if everything is turned on.

Next, you'd look in Device Manager, and see if
all the hardware is accounted for. And the USB3
has been given a driver. Both WinXP and Win7
need USB3 drivers (XHCI).

I can't give any excuses for why it works or does
not work. While the enumeration seems to get clogged
up in the OS, there's no "theme" to it. It doesn't
happen to everyone. Would "Safely Remove" make
a difference ? Is there some transient that puts
half filled records in the registry ? I would think
USB would need damn good software filtering to eliminate
the possibility of such.

USB works best if the devices have unique serial numbers.
That can reduce the amount of entries in the registry
(a previously inserted stick would leave behind a
serial, and wouldn't need to be recorded when it
comes in on another port).

Paul