Comments on: How to fix USB device not recognized in Windows

By: Tony

Tony — Sun, 22 Nov 2009 20:28:43 +0000

I updated to Windows 7 and thought that the USB not working problem to be related. However, I will say that the ports worked after upgrade but when I plugged in my ipod the ports all stopped reading devices. THIS is a GREAT FIX and it worked!

By: makkandy

makkandy — Sat, 21 Nov 2009 14:27:02 +0000

Everyone is saying this method works but it doesnt work for me. I’m using an advent laptop with windows vista and everytime i put in my usb it always says the same thing. usb device not recognized. I have tried takin the battery out and leaving and putting it back in but it doesnt work. i have also trie using different PC’s and laptopts but none of them recognized it. pls tell me if there is any other solution apart from unplugging everything!

By: kengjung2528

kengjung2528 — Sat, 21 Nov 2009 08:45:54 +0000

1. Click Start. Click Run. Type cmd and press OK.
2. Type “set DEVMGR_SHOW_DETAILS=1″ (without quotation marks) and press Enter.
3. Type “set DEVMGR_SHOW_NONPRESENT_DEVICES=1″ (without quotation marks) and Press Enter.
4. Type “start devmgmt.msc” (without quotation marks) and click press Enter.
5. Click View. Click Show hidden devices.
6. Click “+” to expand Imaging devices, Unknown devices and USB devices.
7. Are there any USB devices and unknown devices (including grayed out devices)? If so, please right-click it and click Uninstall.

By: Cyril/Finland

Cyril/Finland — Thu, 19 Nov 2009 16:04:45 +0000

OMG! This really works for me. Using VERY old Acer with 512 memory and 40GB hard. Thanks man!!!

By: Mel

Mel — Tue, 17 Nov 2009 02:01:33 +0000

Ive been having a problem with my USB for a while now. Whenever i plugged a USB in my whole computer would freeze, and have to be restarted to work again. However, recently my house has been painted, and my computer has been unplugged. since ive connected it again the USB ports seem to be working fine, but now i have this problem.

By: ERICK

ERICK — Mon, 16 Nov 2009 03:44:36 +0000

Thanks, this tip worked like magic… walla and problem solved!

By: Ramson

Ramson — Sun, 15 Nov 2009 06:02:13 +0000

Awsome Dude! Tried it for about 2 mins, but didnt wrk. Then tried for about half hour. Poof! The message is gone! Great man!

By: Jack

Jack — Sat, 14 Nov 2009 21:17:54 +0000

Hi,
for those cases when un-plugging the cord doesn’t help:

As Kallulu said, try disabling the corresponding USB Root Hub in Device manager (you’ll see your “Unknown USB device” under Properties > Power tab). This alone might get your device successfully installed but probably only in USB 1.1 (slower) mode, resulting in “This device can perform faster” msg. So NOW restart, unplug, boot and than try re-enable the USB Root Hub again. With a little bit of luck, everything should work now…

By: mgsipa@gmail

mgsipa@gmail — Fri, 13 Nov 2009 04:34:22 +0000

Surprisingly this worked perfectly well for me on a Toshiba Satellite. Thanks!!

By: Poonam

Poonam — Thu, 12 Nov 2009 13:24:44 +0000

Thanks, this tip worked like magic… walla and problem solved!

By: Sue

Sue — Wed, 11 Nov 2009 14:13:35 +0000

Couldn’t believe this would work but it did- incredible! I’d wasted many hours doing all sorts of fixes – I knew the device and cable worked as I’d tried it on another PC so it had to be my PC and this was so simple!! Thankyou

By: Betru Yemane

Betru Yemane — Wed, 11 Nov 2009 13:51:27 +0000

I tried to fix my Toshiba Laptop using the above method. Still my three USB ports do not accept any drive.More than a month. Please who can help me to fix the problem.

By: Shawn

Shawn — Tue, 10 Nov 2009 15:22:44 +0000

I can’t believe how easy that was! Worked perfectly! Thanks for ending weeks of confusion.

By: Theresa

Theresa — Sun, 08 Nov 2009 07:42:54 +0000

OMG!!!!! Thank you !!! I was dreading the thought of having to take the laptop to be repaired. I did what you said, and YAY!!! it works !!!! I’m very happy !!!!

By: ashley

ashley — Sun, 08 Nov 2009 03:56:12 +0000

amazing! thank you so much…. my printer wasnt working and i needed to print some papers for homework. It said it wasnt recognized and i did this…..It worked!!!