USB External Drive Not Recognized Or "recognized" As An "unknown Device"?
Sep 1, 2005
I have a Sabrent SBT-EKU25 external enclosure with a 2.5 inch hard disk in it. This is a USB 2.0 drive and whenever I connect it to USB 2.0 port, it is not recognized (or "recognized" as an unknown device" ) on all my machines. It however is recognized as a drive and works fine on one laptop which has only USB 1.1 ports.I have tried separately powered USB hubs as well without success. So I don't think it's a power issue.I have even tried deleting all USB devices in Device Manager and let the machine rediscover them.
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Aug 5, 2005
i installed an usb device,and all the drivers for it,it worked for two days, it was recognized.Now it will not recognize the device.I have tried uninstalling and reinstalling the device drivers, all the software that used the device. and even tried to install the driver by locating with 'have disk' browse. i have tried all the directories that the drivers were installed to, and then some. and also the install disk. Device manager says that its an unknown device, and theres no problem with it. but will not update to the proper drivers. How can i alleviate this problem short of reformatting my computer.
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Jun 29, 2005
I have a Gateway 710X running Windows XP Home Edition which has been patched up-to-date.Connected to this is a Western Digital 80Gb external hard drive Model Nr WD800B005-RNN) The drive had been connected to the USB port for a long time without any problems in access. Tonight, however, it seemed to have been discovered as disconnected, and we reconnected the USB cable.Upon reconnection, we get pop-up windows in the lower right corner which state: (1) Found New Hardware: USB Device then switches to (2) Found New Hardware: Unknown Device then appears (3) Found New Hardware: Your new hardware is installed and ready to use then appears (4) USB Device Not Recognized
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Jun 29, 2005
I have a Gateway 710X running Windows XP Home Edition which has been patched up-to-date.Connected to this is a Western Digital 80Gb external hard drive Model Nr WD800B005-RNN) The drive had been connected to the USB port for a long time without any problems in access. Tonight, however, it seemed to have been discovered as disconnected, and we reconnected the USB cable.Upon reconnection, we get pop-up windows in the lower right corner which state: (1) Found New Hardware: USB Device then switches to (2) Found New Hardware: Unknown Device then appears (3) Found New Hardware: Your new hardware is installed and ready to use then appears (4) USB Device Not Recognized
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Jun 8, 2006
I did forget to mention that I had tried this external on 2 different pcs-- the other with xp home with sp2.
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Dec 26, 2005
After backing up on this drive for nine months (and with a reformating three months ago), now the backup will not recognize the E: drive. No error message is given. MY Computer shows that it is now 3/4 full with plenty of space (46 gig) on the Acomodate 160 gig drive under NTSF format. I am thinking of changing to a fire wire from the USB.I have been doing a complete system backup and maybe I'll change to just backing up my documents after we get it working.
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Jan 30, 2007
both my externals are perfectly fine....they work on my other computer. Originally when i plugged them into my laptop the Found New Hardware wizard would startup, but be unable to do anything.
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May 11, 2007
My USB External Hard Drive suddenly decided to stop working monday before last, it is weird, like it will turn on and all, but it doesnt get recognized and while its on none of my programs will load like Ventrilo and games(ventrillo will half load but not all the way) and the computer wont shutdown while its on. but the moment i turn it off they all start running smoothly agian and the computer will shutdown immediatly (if i am at the shutdown screen). Any idea why/how this happened and how to fix it?
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Feb 27, 2008
Win XP Professional in new Dell Vostro does not recognize Bytecc 320 external hsng with 250 gb Seagate drive. Under hardware manager it shows up and says this device working properly. XP does not assign a drive letter. Disk management shows device but reports it as 128 Gb capacity. I do not want to settle for half the drive's capacity so i did not create a partition.
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Apr 18, 2010
I have a sata 500 GB hard drive from Seagate that just won't get recognized. I've been in Disk Management, I've scanned the disk, I've rebooted, and Disk 1 is there, but the message is it's offline--and after I did the reboot I got the message that the hard drive USB had been recognized--but it ain't there.
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Mar 16, 2005
I installed an a 2.5 Toshiba notebook drive in a external enclosure and I can't get XP to recognize it. The drive spins up and the light comes on to indicate it is running but nothing is shown in device manager or My computer. It also is not shown in disk management.I have uninstalled the the USB drivers through the device manager with no change after rebooting. The USB ports work fine with my other external drive.The drive was working fine in a notebook that had a
cracked screen. It is formated in NTFS. What else should I be looking at to solve this problem?
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Jun 29, 2007
I run WIN XP Pro on a Dell desktop that has two hard drive. I recently installed a CD drive and upon rebooting, the secondary drive (D), although recognized by the startup (BIOS), is no longer present when Windows finally opens. It's not present in the device manager and all shortcuts to it are null. All the bables are correctly installed and I've tried rebooting, re-installing the drive to no avail.
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Mar 14, 2007
Got a Western Digital My Book essential edition USB 160GB, reformatted it from FAT32 to NTFS, backed up everything I wanted and did the clean install. It worked. I had a few problems getting the OS to recognize my USB Canoscan, but worked that out. My problem now is that the OS won't see the external hard drive unless I'm in safe mode. In safe mode it is assigned drive letter J, which was the same drive letter it was before the OS reinstall. It does not show up in drive manager. Nothing changes in device manager when I unplug/replug it and no new hardware is found. Device manager does show an unknown device, but that was there before anything was plugged in (which is distressing in itself!)
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Dec 16, 2006
What would cause a relatively new HP Media Center computer to recognize other things inserted into any of the USB ports in the front (for example, a jump drive), but NOT recognize one device (a Lowrance iWAY 500c GPS car navigation device) that is readily recognized when it's plugged into a different computer?The HP computer is a friend's. The "different computer" is mine, a custom machine from Puget Systems with a P4 on an Asus MoBo. On the friend's computer, we get a "bubble" message from the taskbar to the effect that the device is not recognized -- so it knows something is plugged in, but apparently doesn't have the driver for it.
Her system is running Win XP and I assume (but don't know for sure) that she's kept up with Windows updates.
When I check MyComputer, the Lowrance isn't on the list. In Device Manager, it's listed as "Unknown device".I'm wondering about things like the HP lists a pot full of drives because it has all the camera card slots, etc. in the front panel (I think the drives go all the way up to J:, almost all of which are "removable drives".
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Mar 21, 2010
i have belking N+ adapter comes with a stand which plugs in to my usb drives. Recently i have been getting Device is not recognized ive read through many forums on the "Fix" i unplugged my computer i un-installed my drives and the problem still continues only if i have the original belking stand. when i remove the stand and connect the adapter straight to my computer everything is fine. I did some tests with other usb extension cables i get the same problem but after removing and plugin in the cable a few times it works. Ive had moments when i have the belking stand connected i will get a connection signal but a few seconds later it will send a message USB device not recognized.
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Jul 8, 2005
Whenever I try to use a usb device in xp pro it always shows up as unknown device or the usb device not recognized pop up comes up. It happens with everything, memory stick reader to a gaming controller. My specs Aopen AK79D-400 MAX mobo ,512mb ddr, 160gb western digital, xp pro .
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Nov 28, 2005
When trying to perform the following cmd instruction C:Documents and Settings......ping I get the following error message 'ping' is not recognized as a internal or external command
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Aug 8, 2005
when trying to type a command in MS-DOS, I get the below error message. This is the same for an IPCONFIG or a PING command. Does anyone know how to correct this? I have win XP SP1 'ipconfig' is not recognized as an internal or external command,operable program or batch file.
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Apr 21, 2009
I have a Western Digital Passport 320GB External Harddrive that is no longer recognized by the computer. It worked two days ago... now nothing. I get a pop up when I plug it in that states: USB Device Not Recognized.I checked Device Manager: Universal Serial Bus Controllers-Unknown Device.It's not a drive letter issue. Windows XP SP3 does not recognize it all.
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Sep 20, 2007
I've just bought a Lacie Porsche external harddisk 120GB if i connect it to a Windows XP Pro. SP2 / Desktop Small factor D500 1.7 Ghz PC the controller recognizes that a device has been connected but i cannot find it of my computer neither on the Disk management window.
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Apr 11, 2008
6 months ago a message popped up saying "USB Device Not Recognized". I have 8 usb ports. The only one that i'm using is for the printer. It works fine. This message seemed to pop up after using my Sansa MP3 player. It to works fine. Everything that I have read about this problem is when people have it the device does not work.In my situation everything(digital camera,printer,Ipod)all work with no problem. This message went away for almost 2 months but now it's back again. Anyone help me out here? I'm running Windows XP home edition and the computer is 1 1/2 years old. One other thing. As i'm typing this the message appears and disappears on it's own. It will do this once every 30 seconds.
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Jul 25, 2009
everytime i plug in a usb/external hardrive, it isnt recognized in my computer, its not too do with any hardware, im 100% its a software issue, and i was running a program and it seemed to do something nothing comes up in my computer but you hear the connected sound, ive tried assignign a manual drive letter but it comes up with an error. and seeing as i cant back anything up because nothings regonized
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Jun 9, 2007
Here is the situation, I have a Dell 700M Inspiron Laptop running windows XP. I have 2 usb ports and alternate between 3 devices - a usb mouse, my pocket pc cell phone, and a Western Digital Mybook External Hard drive. All of a sudden my USB ports stopped recognizing my devices. It still sends power though because I can still plug in my cell phone to charge it. The problem is that the computer fails to recognize any devices anymore, even my mouse. I have uninstalled and reinstalled the drivers and restarted my computer several times, I even tried system restore. It may have to do with the fact that I accidently unplugged my hard drive while it was still running without using safely remove my hardware. I have heard stories of western digital harddrives causing BIOS and motherboard failures.
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Nov 10, 2007
the other day I tried to insert my friends usb into one of the frontal usb ports, it said it couldn't recognize the device or that it had malfunctioned. From that point on, Anything connected to the pc via the usb won't be recognized. everything else on the pc works fine, so theirs either some really easy way of fixing this or i need to buy a new motherboard/serial bus.
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Sep 21, 2007
I have been using this pc with windows xp for about a month now and up to now I have had no problems, but for some reason my drive has suddenly stopped reading dvds...My drive is an Optiarc DVD-RW AD-5170AI can insert a cd and it recognizes and reads the disk perfectly, but when I insert a dvd windows appears to start to read the disk, but after a few seconds nothing seems to be happening except that the read light on the drive is lit and the drive makes a few strange sounds. I have left it to load for a few minutes but still nothing happens.After searching, I have found 2 possible solutions:The first was to uninstall the driver and restart. Upon restart windows will reinstall the device.I tried that twice, still experiencing the same problem.
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Dec 13, 2006
A Toshiba Satellite 2805-S503 that originally came with Windows ME. My friend at work upgraded my OS to Windows XP but now my CD-ROM drive doesn't recognize CDs. It recognizes DVDs and some games, but it won't read any CDs.
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Feb 1, 2009
I have a Compaq Presario with a Celeron CPU 2.53 GHz and 504 MB of Ram. I use Windows XP Home Edition Version 2002 Service Pack 3. I know its a old machine but does what I need it to do. My computer has done this for a long time but I'm getting sick of having to restart the system to access CD drive. When system initially boots up the CD drive will open and close just fine but sometime later (not sure exactly how much later, (hours of 1-2 days) the door won't open by pushing button or sticking pin in small hole. If I go to My computer it doesn't even show the CD drive. What could be causing this?
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Jun 22, 2005
I'm now praying that this will get fixed--my computer isn't recognizing any cd's I put in my d drive. It won't show up anywhere and when I go to my device manager there's a red x on top of the cd icon. I don't have any viruses or anything-I've run everything- and I've tried unplugging some of the wires and replugging them. I don't even know what that;s suposed to do or which wire is which. If anyone can help I would be soooooo grateful. my dad'll blame this on me if it doesnt get fixed asap. I have windows xp. and when I type in D:/ into run, I get the message:
D:/ refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it stil cannot be located, the information might have been moved to a different location.
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Feb 20, 2007
I've got a IBM ThinkCenter that just won't boot. It powers on just fine, and I even tried installing a brand new power supply, so power isn't the problem. When I turn it on, I almost immediately get the IBM and Intel logos on screen but that's all. The machine does not seem to try to read from the hard drive, CD ROM or A drive. It never allows me to enter the BIOS or try to start Windows. I'm not even sure if the keyboard and mouse are being recognized. Is this a hardware problem? if so what? or can I still get this thing to boot somehow?
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Jun 19, 2005
I was aware that Windows used to have limitations on the size of Hard Disk Drives for file sizes etc. but I had thought that these had now been fixed with XP & XP PRO. I installed a new 250GB into a friends machine about a month ago & this went without incident. Yesterday I just put into an external caddie a USB2 drive of 300GB into my machine. XP Pro recognizes the drive & it will work but my computer displays the size as only 127GB which is less than half 's true size.
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Jul 4, 2005
I recently recieved a Maxtor 40 GB Hard drive. i have installed everything Correctly ie. Power, Cable, ect. I have tried every single configuration of Jumper settings. It was reconized in bios, but it wouldn't come up as an icon in Xp. I have Xp Home W/SP2
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