"unrecognized usb device": error message every time that a usb device is plugged into one of the usb ports

"unrecognized usb device": error message every time that a usb device is plugged into one of the usb ports

1. my laptop - acer aspire 5030 - has been having this problem for the last five months.

2. I tried everything including changing service pack, as we have xp professional, he has recently upgraded to vista business 32-bit with service pack 1.

3 tried all the methods start the laptop after a few hours, remove the battery, press the power button for half a minute, and so on.

4. I finally he formatted a couple of times, but the problem is not.

5. later, I improved the professional system of vista and installed the latest security patches, but the problem remains

6. now, I started to update its drivers, although the device is identified to be connected, but is not recognized. "the error message" not recognized usb device "appears. I try to reinstall the drivers or upgrade of drivers, it does not. It displays the message "the drivers for this device are to this day.

7. initially, the connection of the device, the drivers are installed but still the device does not show in Explorer.

8. I tried to change some registry values by merging a regedit file in the registry - for display devices that are not present; but still, it has failed.

9. I then tried to delete the file infcache1.inf in c:\windows\system32\inf, but the problem persists.

10. Subsequently, I tried to create another registry entry to "disable selective suspend" in HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\USB by adding DWORD and assigning a binary value of 1.

11. I tried later also to uninstall all the system devices including USB controllers, drives and the storage controllers, who must still without success.

12. I tried to see if the drivers in safe mode, which they did not.

13. I tried to delete the following registry entries =

HKEY_LOCAL_MACHINES\System\CurrentControlSet\Enum | USB PORT; HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\ {4D36E967-E325-11CE-BFCI-08002BE10318 & HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\ {4D36E967-E325-11CE-BFCI-08002BE10200.  The computer does not have alow it.

14. the BIOS indicates device pnp "disabled", which I also look for the BIOS settings, which do not allow me to change to change existing ones.

15. I have not found the WINDOWS\SYSTEM32\drivers\USBSTOR file. SYS in my driver store. This affects the system?

16. I also contacted manufacturers pnp devices that provided me with most recent and versions compatible drivers for my devices - namely an apple ipod & Seagate external HARD drive - but even after that the drivers are installed properly and the system rebooted the problem remains. Is this something to do with the updated playing driver registry entries does not after the update? OR is what registry entries are configured to only read the entries at the time of the installation of the OS?

17. I also contacted local sellers who have suggested to me to change the "motherboard". This will help as a last resort?

18. in the meantime I had also installed other operating systems to Linux - Fedora and Ubuntu; Full Windows XP - Home & Professional and Vista Edition. All these have been installed successfully but do not solve the problem of usb.

19. I have also raised the original HARD disk & replaced by another HARD disk. also checked the power of all ihee and ehee usb ports to be at least 5 V. I also disabled the automatic deactivation of devices usb by the system. physical contact, ports and connecting cable is fine. the distribution of power is set at 10% for the ihee ports and 20% for ports ehee, which is what is should be the physical output is also close to 5V for all ports connected.

20. all professional (hardware or software) should any solution for the problem of the usb ports on my laptop?

Something that you haven't tried:

How to fix USB device not recognized in Windows

http://www.online-tech-tips.com/computer-tips/USB-device-not-recognized/

I hope I could help

Tags: Windows

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