Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: USB device not recognized - Help!

24 Jul 2010   #51

Windows 7 Pro 64-bit

I've finally been able to work around this problem and in explaining maybe it'll provide some insight to where the problem lies.

The place where the problem became most frustrating was when I'd try to us a Compact Flash card reader to load photos from the cards to the hard drives. I'm a photographer so I do this quite often. I found that I could only use a simple card reader (ie: non-powered, unbuffered) once after a clean boot. And even sometimes that didn't work.

What worked most reliably was plugging the camera directly in to the desktop (same problem with laptop, but solution won't work) and allowing its embedded system to communicate with the USB subsystem. This worked without fail. (See a pattern here?)

I finally bought a 3.5" card reader that I plugged directly into the mobo on the desktop. That was 2 weeks ago. I haven't had a problem with it recognizing a card yet.

This seems to say that some "intelligent" controller is required to handle recognition of a new USB device and that "plug and play" doesn't work very well when a certain level of complexity is achieved within the USB subsystem (I have a hub for 3 printers, KB and mouse, and a couple of other USB devices connected)

I've been led to believe that there's no limit (well, within reason) to the number of USB devices that one can use on a given system. I'm beginning to question that.

The only drawback to this is at boot time when USB0 is searched for, even though there's no card in the reader. The boot process hangs, apparently on a timeout value, waiting for it to find a card or other device. Once past that, it works very well...if you don't mind a card reader sitting on the desk, since I'm out of 3.5" mounting slots.

My conclusion? USB ain't as universal as the computer industry would like us to believe. Furthermore, Microsoft has been silent on this issue as well as several others. Is it on a list of problems attributed to "outside hardware vendors" or other non MS entities and therefore ignored? I don't know. All I know is I'm gonna have to transfer all my files to my laptop directly from my camera (I'll use a spare camera) on the salt flats over the next several months to avoid the problems I had last year.

My System SpecsSystem Spec
02 Nov 2010   #52

Windows 7 Ultimate 64bit

I searched the web endlessly for answers and solutions, i tried all and none worked.

I took a change and sent my clients motherboard back to the supplier (as it was 6 months old and still under warranty - MSI G31 - ) and told them the USB ports are malfuntioning. With out them testing the board they replaced it with a new one.
I placed the board in the box (didn't need to update or install any drivers because it was the same chipset as the previous motherboard) and whala... all the USB ports worked again.

Replace your motherboard if problem presists.
My System SpecsSystem Spec
15 Nov 2010   #53
Bill Wilson

7 ultimate

I also suffered from win7 not rcognizing a 4gig thumb drive. The solution was to plug it into an external hdd sata docking station with card & usb sockets, it then functioned perfectly
My System SpecsSystem Spec

16 Nov 2010   #54

Windows 7 Pro 64-bit

It's not a mobo issue...not unless I have 4 computers, all of different brand and vintage...and OS: two on 7 and two on XP that exhibit the same problem. It's a known issue. Windows USB handling is pretty good, but it requires an intelligent controller for storage devices. Just like Bill W (hi, friend) I had to buy an external controller for my main system and then connect my cameras directly to my laptop to unload the photos (Canon 7D, 40D and 20D) rather than using a "dumb" card reader.

I'm sniffing around the market for a new laptop and one of the requirements is a FireWire port so I can use an external FW reader (which work problems switching cards with them) and DVD burner.

The problem is inside Windows and its handling of USB storage devices. With the proliferation of thumb drives and other removable media, it's time for this issue to be resolved.
My System SpecsSystem Spec
17 Jan 2011   #55

Windows 7 Professional (64 bit)
USB Device not recognised

I have exactly the same problem as many others with the usb device not recognized message constantly popping up on screen. Brand new computer with fresh install of Windows 7. Been running for a few months with no problems, then all of a sudden this message keeps popping up relentlessly. My BIOS is up to date and the M/B chip set drivers are up to date. I have tried every remedy I have seen posted here and the problem persists. This problem happens even when every usb device is disconnected from the machine, including keyboard and mouse! I am beginning to question the quality and value of buying Windows 7 if this is the performance it delivers!
My System SpecsSystem Spec
17 Jan 2011   #56

Windows 7 64 bit

I had this same issue, I had to uninstall all USB ports, Plug in each USB device individually and let windows reinstall them one by one.
*Control Panel-Device manager-Universal Serial BUS Controllers USB-
-Uninstall all Root hub & USB storage devices...Then Windows will reinstall them when you plug in each device separately. i hope this works.
My System SpecsSystem Spec
17 Jan 2011   #57

Windows 7 Professional (64 bit)
USB Device not recognised

Tried all the advice on this forum and it cures the problem for about 10 minutes!
My System SpecsSystem Spec
22 Jan 2011   #58

Windows 7 Professional (64 bit)

More developments; computer seemed to cure itself for awhile, when it went for several hours without the message appearing. Now it has come back. Also, when computer is put into sleep mode, it immediately wakes up again. Hmmm. Why is Microsoft so silent on this problem?
My System SpecsSystem Spec
23 Jan 2011   #59

XP Pro - Vista - windows 7 ultimate/64 - 8.1 - 10
usb recognition probs

I have had 2 PCs with USB problems under windows 7. Both were caused by faulty memeory card readers. In one case the the card reader had caused the usb pci-e card to burn out, in the other case simply unplugging the memory card reader from the motherboard, the USB slots worked.

Obviously there is no single cause for these USB probs, so hope this helps someone.
My System SpecsSystem Spec
31 Jan 2011   #60

Windows 7 Professional 64bit
random try

try this step:
1. go to computer icon and right click, choose ' manage ' . if the desktop doesn't have my computer icon, press windows(flag one), there's computer written there.
2. after click manage, under system tools, click device manager.
3. here you can see 'computer', 'disk drives', 'dvd/rom', 'keyboard', 'monitors' and so on.
4. find 'universal serial buses. double click it and there's some usb does not recognized. (as for my laptop acer, i only have 2 USB plug. which mean only 2 icon does not recognized). there's two icon signed with an exclamation mark there.
5. at that icon, right click it and click 'update driver software'.
6. click ' browse my computer for driver software'.
7. click ' let me pick from a list of device drivers on my computer. '
8. here, just click next, since the driver already installed on your computer.
9. after finished update, you can see the icon change same like the rest.
10.update the rest using the same step.

hope this helps.:)
My System SpecsSystem Spec

 USB device not recognized - Help!

Thread Tools

Similar help and support threads
Thread Forum
USB Device Not Recognized. Device Error 43/45
i don't know what is this problem. and it always appears on my system tray How to fix it? These are some pictures.
Hardware & Devices
USB Device Not Recognized
Hi, While working on my laptop yesterday evening, my mouse & external hdd stopped responding. On ejecting & re-inserting them both started getting this message 'USB Device Not Recognized'. Now none of my three USB ports are working. Though on cross checking, the devices are working on other...
Hardware & Devices
USB device not recognized.
I'm pretty sure that it isn't the first subject about it, but I didn't find any threads wich looked like mine, so I'm doing a new one. Yesterday, I was browsing the Internet like everyday of the week, and my mouse stopped working, for no reason. It just does the "tadam" (sound wich is done when we...
Hardware & Devices
USB device not recognized - but there is no usb device connected
It's recognized in device manager as "Unknown device". But I've not connected anything to pc. Also all of my usb ports are working at 1.1 speed. When I try to connect any device, I get the message "that it could work faster, if i connect it to hi-speed usb port". Any suggestions?
Hardware & Devices
USB Device Not Recognized
I've had an issue that has been driving me nuts for the past few hours. I have a Dell Inspiron 537s tower on which ive done a clean install of Windows 7 x64. Everytime I plug in a USB device it gives me a "usb device not recognized error". I've tried every solution ive found (uninstall all usb...
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 03:50.
Twitter Facebook Google+