I have four ports. Two are working, and other other two are not. My Logitech unifier is recognized and also the cable to and my printer.
Flash drives are not at these two ports, but if I remove the unifier and plug in a drive, the drive is recognized.
I ran Dell's "USB Status Test" with the pre-installed software, and both "pass the test"
Device version 0.0.0
USB version 2.0.0
version 6.1.7601.21692, 6-21-2006
\usbhub.sys (more may be truncated??)
I ran the USB POrts scan, and the display shows devices attached to each port.
HELP! and thanks much