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Dell desktop will not recognize usb storage over 128 MB capacity

Dell Precision 360 with bios updated and all windows xp pro patches in place.  It will recognize a usb flash drive that is 128 MB but will not recognize 512, 1GB, much less a usb hard drive.  Dell says it is not their problem.  Users say ... "it used to accept the 1 GB usb flash drive."  PCcillin AV has recently been added.

Any suggestions?   Thanks
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paleface
Asked:
paleface
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1 Solution
 
CallandorCommented:
Were there any Windows updates that installed in between?  I would remove the USB drivers in device manager and let them reinstall on reboot.  The driver may have been corrupted.
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palefaceAuthor Commented:
remove alllll usb drivers in device manager??  printer support and host controller too?  or just root hubs?
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CallandorCommented:
Just the ones under USB controller hubs.
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palefaceAuthor Commented:
Ok I removed all the USB root hubs under the controllers and rebooted ... didn't work.  There are 4 Intel host controllers and a standard enhanced pci to usb host controller as well.  When I plug one of the flash drives over 128 MB capacity in it shows up as an "unknown device" in the usb controller portion of device manager - and it doesn't matter if I use the port on the face of the pc or one of the ports on the back  . An error msg pops up stating "ONe of the USB devices attached to this computer malfunctioned and Windows does not recognize it." when the flash drive is inserted.

"No drivers are installed for this device." is posted under device status in the properties.  But the driver is listed as provided by microsoft on 7/1/2001.

????
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CallandorCommented:
Do you have a powered USB hub to try between the port and the flash drive?  Are the flash drives all formatted the same?  Can you see the unrecognized flash drives in disk management?
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palefaceAuthor Commented:
I have not tried the powered hub.  THe flash drives and the ext hd all work on other computers running xp pro.  the drives do not show up in disk management.
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FriarTukCommented:
open regedit & delete both below
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USBSTOR
exit regedit & reboot pc to reinstall usb drivers
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palefaceAuthor Commented:
I get an error when trying to delete these keys or any of the branches beneath.
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FriarTukCommented:
what is the error, do you not have authority, ie aren't you an administrator on the pc?
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palefaceAuthor Commented:
yes, I am operating from an administrator account.
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palefaceAuthor Commented:
the error is simply ... cannot delete key.
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FriarTukCommented:
right click on the key, click permissions, & add yourself with full control, exit regedit & restart it to see if you can delete it.
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palefaceAuthor Commented:
FriarTuk ... good try but it still doesn't work.  I could tell the drivers were reloaded and the machine acted like it was a fresh usb device .... still got the same unknown device error.
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FriarTukCommented:
were you able to delete those keys? or you did & it reloaded but didn't resolve?

try deleting, where ? is the drive letter associated with any & all usb drives
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\
\DosDevices\?:
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palefaceAuthor Commented:
Yes I deleted the keys... and yes I rebooted and it did not resolve.

There are no ? HKLM\SYSTEM\MountedDevices\ DosDevices.  All the listed \DosDevices are configured as A: , C: , D:, etc.  However just above those are \??\volumes  but I've looked on several machines and that seems normal, so I did not delete those just yet.


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FriarTukCommented:
those are ok

try running sfc /scannow

try restoring to a date before pcillin
http://support.microsoft.com/?kbid=306084 (in windows)
http://support.microsoft.com/?kbid=304449 (in cmd prompt)

if it doesn't help then i'd recommend trying to do a repair (method 2)
http://support.microsoft.com/?kbid=315341
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palefaceAuthor Commented:
sorry ... i didn't mention it but had already tried the sfc option.  I have uninstalled and reinstalled pcillin. but haven't tried a restore point .. thanks
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palefaceAuthor Commented:
The restore did not work either.

I could do the repair but these ppl don't have their original install disk or key code.

I can come up with a disk ... but without their key code ... what can I do?
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FriarTukCommented:
you can download & run keyfinder to get the cd key
http://www.magicaljellybean.com/keyfinder.shtml

then you can use another cd for the repair as long as it is the same os, ie xp hm or pro with sp1 or sp2
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FriarTukCommented:
hey paleface, what's your status? plz provide feedback for further assistance.
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palefaceAuthor Commented:
Thanks FriarTuk for all the help and very useful info.  I won't be able to get back to that computer until next weekend 6/24 and I will attempt the repair (method 2)then ... meanwhile they came up with the key code... sorry for the delay.
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palefaceAuthor Commented:
I'm still active  :) ... just haven't been able to get my hands back on that machine .. soon though.
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FriarTukCommented:
ok, thx for the update, plz remember to post every couple of weeks if you can with updates or for more info
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