USB behavior in Windows XP / Admin rights

[Guest Sandy Wood]

We've run across an issue with non-admin users on Windows XP and USB devices.

We've found that when we plug in, say a USB camera, install the software as

an admin and then have the non-admin user login, the device works fine. We're

getting calls now from users that after they power down and backup, they are

being asked to install the software again. I'm wondering if anyone is seeing

this behavoir.

 

I've seen some posts out there that may offer some clues. Once post

mentioned that maybe the non-admin user rebooted and then plugged the USB

device into another USB port where it would be required to have the software

installed again. It is inferred that is the user continues to use the same

USB port, they won't be prompted to install the driver unless they move the

device. Is this the normal behavior?

--

Sandy Wood

Orange County District Attorney

[Guest R. McCarty]

Re: USB behavior in Windows XP / Admin rights

 

If the device in question is a USB1(.1) device or your computer has

multiple Enhanced (USB 2.0) controllers/hubs. USB is internally

routed based on the device's technology.

 

Devices can be re-enumerated if they route to a different controller/hub

than in a prior use ( different socket ). This creates a new instance

of the device.

 

"Sandy Wood" <sandy.wood@nospam.com> wrote in message

news:65920B31-A017-499E-BD1F-2BFA3294D47F@microsoft.com...

> We've run across an issue with non-admin users on Windows XP and USB

> devices.

> We've found that when we plug in, say a USB camera, install the software

> as

> an admin and then have the non-admin user login, the device works fine.

> We're

> getting calls now from users that after they power down and backup, they

> are

> being asked to install the software again. I'm wondering if anyone is

> seeing

> this behavoir.

>

> I've seen some posts out there that may offer some clues. Once post

> mentioned that maybe the non-admin user rebooted and then plugged the USB

> device into another USB port where it would be required to have the

> software

> installed again. It is inferred that is the user continues to use the same

> USB port, they won't be prompted to install the driver unless they move

> the

> device. Is this the normal behavior?

> --

> Sandy Wood

> Orange County District Attorney

[Guest Sandy Wood]

Re: USB behavior in Windows XP / Admin rights

 

All the USB ports on our systems are 2.0. Could plugging them into another

port require the driver to be installed again?

--

Sandy Wood

Orange County District Attorney

 

 

"R. McCarty" wrote:

> If the device in question is a USB1(.1) device or your computer has

> multiple Enhanced (USB 2.0) controllers/hubs. USB is internally

> routed based on the device's technology.

>

> Devices can be re-enumerated if they route to a different controller/hub

> than in a prior use ( different socket ). This creates a new instance

> of the device.

>

> "Sandy Wood" <sandy.wood@nospam.com> wrote in message

> news:65920B31-A017-499E-BD1F-2BFA3294D47F@microsoft.com...

> > We've run across an issue with non-admin users on Windows XP and USB

> > devices.

> > We've found that when we plug in, say a USB camera, install the software

> > as

> > an admin and then have the non-admin user login, the device works fine.

> > We're

> > getting calls now from users that after they power down and backup, they

> > are

> > being asked to install the software again. I'm wondering if anyone is

> > seeing

> > this behavoir.

> >

> > I've seen some posts out there that may offer some clues. Once post

> > mentioned that maybe the non-admin user rebooted and then plugged the USB

> > device into another USB port where it would be required to have the

> > software

> > installed again. It is inferred that is the user continues to use the same

> > USB port, they won't be prompted to install the driver unless they move

> > the

> > device. Is this the normal behavior?

> > --

> > Sandy Wood

> > Orange County District Attorney

>

>

>

[Guest Thee Chicago Wolf]

Re: USB behavior in Windows XP / Admin rights

 

>All the USB ports on our systems are 2.0. Could plugging them into another

>port require the driver to be installed again?

 

Yes, that's not unusual behavior. If the USB device is always plugged

into the same port and never changes, you'll not likely see any

messages about the driver.

 

- Thee Chicago Wolf

[Guest Uwe Sieber]

Re: USB behavior in Windows XP / Admin rights

 

Sandy Wood wrote:

> We've run across an issue with non-admin users on Windows XP and USB devices.

> We've found that when we plug in, say a USB camera, install the software as

> an admin and then have the non-admin user login, the device works fine. We're

> getting calls now from users that after they power down and backup, they are

> being asked to install the software again. I'm wondering if anyone is seeing

> this behavoir.

>

> I've seen some posts out there that may offer some clues. Once post

> mentioned that maybe the non-admin user rebooted and then plugged the USB

> device into another USB port where it would be required to have the software

> installed again. It is inferred that is the user continues to use the same

> USB port, they won't be prompted to install the driver unless they move the

> device. Is this the normal behavior?

 

Yes. It depends on the USB device having an USB hardware serial

number or not. See here for more information:

 

http://www.uwe-sieber.de/usbtrouble_e.html#serial

 

 

 

Uwe

[Guest Uwe Sieber]

Re: USB behavior in Windows XP / Admin rights

 

Sandy Wood wrote:

> We've run across an issue with non-admin users on Windows XP and USB devices.

> We've found that when we plug in, say a USB camera, install the software as

> an admin and then have the non-admin user login, the device works fine. We're

> getting calls now from users that after they power down and backup, they are

> being asked to install the software again. I'm wondering if anyone is seeing

> this behavoir.

>

> I've seen some posts out there that may offer some clues. Once post

> mentioned that maybe the non-admin user rebooted and then plugged the USB

> device into another USB port where it would be required to have the software

> installed again. It is inferred that is the user continues to use the same

> USB port, they won't be prompted to install the driver unless they move the

> device. Is this the normal behavior?

 

Yes. It depends on the USB device having an USB hardware serial

number or not. See here for more information:

 

http://www.uwe-sieber.de/usbtrouble_e.html#serial

 

 

 

Uwe