Macbook pro USB ports stopped working

After downloading the new OS (and the updates), my USB ports have stopped working. I've tried a variety of resets (resetting the PRAM, GMC reset, resetting the computer, etc.). One of the USB ports would read the usb for a wireless mouse (and only that wireless mouse, no flash drives or ipod cables), but that stopped working as well.
What else is there to do? The system is only a year old. I've never had a problem concerning usb ports on other computers, especially after a software upgrade.
Any ideas?
Thanks

I have had a similar problem since upgrading to Lion 10.7.3. I have a MacPro and all was going well. However, now I have huge problems with my USB ports. Some are recognized some of the time if I unplug then replug, but not in a reliable manner. This applies to USB ports at both the front and back of my computer. My printer won't work or my mouse won't work (but at times I can get one or the other), but any external USB drives (including camera's) and my iPhone are not recognized. Obviously very frustrating. Other issues that seem to have occured are recognition of Outlook for Mac, so have reverted to MacMail (not as good, but working).
Looking through a variety of threads, this issue isn't that new going back to at least July of 2011 (http://www.mac-forums.com/forums/os-x-operating-system/245665-os-x-lion-will-not -read-external-hard-drives-usb-flash-drives.html).
I am also involved in long-running saga with "upgrade" from MobileMe to iCloud that has led to many individuals (including myself) losing "push" email capability despite 9 months and 35 pages worth of problems on the Apple Support site (https://discussions.apple.com/message/18033340?ac_cid=142432#18033340).
Having been an Apple user since 1988 it is ironic that as it becomes more popular it becomes increasingly less reliable.
Does anyone have any solutions for the USB problem that are reliable?

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