I am trying to use a new mp3 player, but get device not recognized. I have tried several new players (even different brands), and old players, all get same error- USB device not recognized. In device manager, it shows as unknown device, and under properties it shows drivers not installed. I have verified everything (XP service pack 3, windows media player 11). And even stumped the tech support with one of the player manufacturers. I am sure the problem is my computer, in particular my usb. I have several other devices that all work fine. I have also tried every usb port on my computer. I have other devices that work fine, even with the same cable. I have previously had 2 mp3's work fine. I thought was player, (kids wore out, etc) so I got new ones- exact same kind- all get the same error. so I suspect even the old players are good- the problem is the computer.

SOURCE: Sansa e260 says connected but device not recognized

I agree with the above suggestion. Try setting the USB Mode under "Settings" on "MSC" on the Sansa. My computer would not recognize the e260 when the mode was set to "MTP"; works fine on "MSC".

Iqbal Husain

• 655 Answers
• Posted on Apr 15, 2008

SOURCE: USB port problems with hp printer

There are few things to remember using USB.

• If your System is in hybernation mode, don't remove any attached USB device, because it will damage your USB driver. This is one of the known problem from microsoft.
• If you have to remove any USB device use 'Safely Remove Hardware'.

1. You should un-install the 'Universal Serial Bus Controllers' from Device Manager.
2. Then re-boot to clean registry.
3. Install the 'Universal Serial Bus Controllers' using XP Setup CD.
4. Then check the Mass storage, PDA etc, it should recognized by XP.
5. Then install printer driver (don't attach printer to system untill setup finish or setup says to connect).

SOURCE: Sansa M230 not seen in Explorer or Windows Media Player

We had the same problem with Windows XP. We found some help on the Sandisk web site. On the device go to the Settings menu, then USB. We changed from AutoDetect to MSC mode and everything is working again. Our computer saw all of the songs on our computer fine. Some of the old songs on the Sansa didn't show up on the detect list in Windows Media Player, but they were still on the device.

SOURCE: labtec webcam driver problem

if you have he caera picture you are downloading the wrong drivers.

here are the proper drivers--
http://labtec.com/index.cfm/service/listing/APAC/EN,crid=68,crid2=1764

SOURCE: Samsung YP-U3 is not recognized by computer

it is not appering in my copmuters but it is charging.