Hi, Don't know the age of your computer, my Explora is from 3/2000, and I have updated the VIA 4inone drivers about 3 times.... let's find out what motherboard you have.
Please, when you have time, need not be today- download the Belarc Advisor from here:
www.belarc.com
it's a small hardware IDer that we reccommend to show you the hardware, chips, devices and software installed on your machine, in an easy to see one page format. It's free.
Download to your desktop, 2 click the file to install, then run the program from the desktop icon whenever you feel like viewing the info. it is prinitable, and does contain you Windows Product Key Code numbers, that you need when you reinstall....in case you do not have them recorded someplace, this is a good time to do so. Saving the page it displays to a floppy disk is also good to do.
Tell me what it gives you for Mainboard or System Board, that is your motherboard ID....mine is a FIC SD-11....if yours is too, I know just where to get an updated driver that has patches you may need for your system. Also, tell me what it shows for Video Adapter (Graphics)....
Whether it fixes anything to do with the USB hub, I cant really say, but it's a good idea to patch the system while you can. These VIA 4inone drivers are self-detecting, they install only what you need, and contain USB updates along with the rest.
The only other thing I can think of is the possibility that your antivirus program, if left on in the background, might have messed up the install....you want to be sure and turn off antivirus temporarily (which means turn it back on after you are done!!) during software, driver, etc installations. Remote possibility that the hub might be slightly bad....let's hope not.