Optiplex 780 desktop doesn't recognize USB thumb drives. Win 7 32.

I've not found an obvious solution to this
LVL 27
Fred MarshallPrincipalAsked:
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JohnBusiness Consultant (Owner)Commented:
If it is ALL USB ports on that computer, suspect Motherboard.

Windows 7 has built-in USB drivers. Nonetheless, did you check the Dell driver support site for USB drivers?

Try running System File Checker. Run SFC /SCANNOW and allow to complete. Run again if errors remain after the first run. Restart and test.

.... Thinkpads_User
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ZamZ0Commented:
Are all of your drivers up to date? You may want to focus on updating your chipset drivers. Did this happen all of a sudden or has it always been like this? Any recent system changes (new hardware/software/etc)?
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Fred MarshallPrincipalAuthor Commented:
I think this was a reinstall (I didn't do it).  I don't anything strange in Device Manager.
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ZamZ0Commented:
Device Manager won't necessarily say anything if you're drivers are old. Try http://www.dell.com/support/drivers/us/en/04/Product/optiplex-780 make sure you are up to date (especially chipset drivers)
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seanabCommented:
Theres a bios update for optiplex that usually fixes that issue, check Dell Support for a new bios updated based on the Dell Tag#
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nobusCommented:
>>   I don't anything strange in Device Manager.  <<  ok , but do you see the USB controllers installed - without error?
try the usb sticks on the BACK of the PC also

test your usb drives on another PC, to be sure they are ok
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ZamZ0Commented:
If you're drivers aren't up to date device manager won't say anything about it unless it can't load any of its resources. The only way to be sure is to download and install EVERY driver and the ones that are rejected due to incompatibility let them go, the rest try to
Force the install
To work even if the drivers are unsigned or whatever windows might try to so. At this point you do t know if you're talking to windows, a virus, or a roootkit. If its something dangerous it will
Leave a trails.
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Fred MarshallPrincipalAuthor Commented:
We ended up replacing the computer.....
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nobusCommented:
ship the old one to me then..lol
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