Personal computing discussed
Moderators: renee, mac_h8r1, Nemesis
Ph.D wrote:
Does anyone know how to solve this issue?
NovusBogus wrote:Have you physically unplugged all USB devices except mouse/KB to see if it's a problem with one of the ports? Assuming that makes the problem go away, try plugging in one device at a time to isolate the cause, or using different ports.
Hz so good wrote:Just noticed the USB hub in the screenshot. Think that device pulls more power than the hub can provide? Just a thought...
Ph.D wrote:But which device would it be? All the external devices I have connected to my PC are connected directly to the motherboard.
Hz so good wrote:That's odd, because it shows an 8 port USB hub, then a 4 port generic hub with only that unknown device connected.
Note that it doesn't show 8port or 4 port hubs.
I also don't have unrecognized USB devices, so that could be part of it. I'm just curious why it lists generic USB hubs possessing X number of ports.
Hz so good wrote:Do you leave that USB device connected while trying to boot? I've got a laptop that will "hang" if I left a thumbdrive attached. It's looking for a boot OS there. Unplugging it fixes it, and it boots like insanely fast.
riviera74 wrote:Try this method first: Click here
Before you go into regedit, unplug everything, go into Safe Mode, then Device Manager and delete ALL USB devices. Cold start with nothing attached, attach one device at a time, then test each device.
This USB issue may well be a registry issue. My brother had a Windows 7 system that would not connect with his external HDD. I had to enter regedit and delete UpperFilters and Lowerfilters and reboot. That actually addressed the issue. It is a MS Knowledge Base article where missing USB drives can be resolved, although I cannot find it right now.
Do you leave that USB device connected while trying to boot? I've got a laptop that will "hang" if I left a thumbdrive attached. It's looking for a boot OS there. Unplugging it fixes it, and it boots like insanely fast.
What USB device? I have no idea what it is.
I leave my keyboard, mouse and mic connected of course.
arunphilip wrote:Are any internal USB headers being used, apart from the ones connected externally?
Also, can you download USBDeview from Nirsoft.net and see what additional information it might show? http://www.nirsoft.net/utils/usb_devices_view.html
Hz so good wrote:Whatever USB devices you have, unplug one at a time, until that "Unknown Device" goes away. Worth a shot, should take less than a minute.
I still have no idea why it lists an 8 port and 4 port hub, respectively.
Ph.D wrote:Hz so good wrote:Whatever USB devices you have, unplug one at a time, until that "Unknown Device" goes away. Worth a shot, should take less than a minute.
I still have no idea why it lists an 8 port and 4 port hub, respectively.
Weirdly enough, the problem seems to have gone away for now. At least no error message has popped up the last 4 times I have booted the PC.
ludi wrote:Look for an internally-installed USB device such as a Memory Card reader that might be loose or malfunctioning, and look for USB ports that are really sloppy or have cracked/loose pieces inside. Both of those can cause all kinds of weirdness that may come and go depending on how recently the defective item was jostled, or what today's ambient humidity might be.
Deanjo wrote:I would first actually try booting up a live linux distro and then compare the output of what lsusb says is there and what windows says is there.
Ph.D wrote:That seems like a lot of work for this...
Ph.D wrote:Deanjo wrote:I would first actually try booting up a live linux distro and then compare the output of what lsusb says is there and what windows says is there.
That seems like a lot of work for this...
Deanjo wrote:Ph.D wrote:Deanjo wrote:I would first actually try booting up a live linux distro and then compare the output of what lsusb says is there and what windows says is there.
That seems like a lot of work for this...
It's a lot less work than taking blind stabs in the dark plus you isolate it to being an OS or hardware issue.
Every good tech has a live linux distro on hand to test and isolate.
Captain Ned wrote:Ph.D wrote:That seems like a lot of work for this...
A live distro of the latest Ubuntu LTS (currently 14.04) burned to DVD has saved my chestnuts many times. Work-wise that's maybe 20 minutes for the D/L and the burn. C'mon, it's one DVD and it loads live into RAM. Turn off the power and it's gone. While it's up you can quickly sort out hardware problems from Windows problems. In recent versions you can even blow away malware/virus .EXEs that repropagate. If I was really naughty I'd tell you how to use it to get local root on a corporate domain machine.