Have you installed sp1? try this firstly, if you have already installed SP1 look below :
Learn how to install Windows 7 Service Pack 1 (SP1)
Some other ideas copied from this thread which has more :
USB device not recognized - Help!
OK, I finally fixed my issue with the USB ports not recognized, here is what I did:
*Unplugged all USB devices
*went to Device manager in windows 7
*uninstalled EACH Root Hub USB
driver
*Powered off my computer/unplug
*Powered back on
*Reconnected each USB device
*They all Loaded sucessfully.
I hope this helps.
Another possibity : try updating your chipset
drivers this is much the same as the above but the latest
driver may make a difference.
Try reinstalling or updating the mouse and the printer software.
It seems to me a software issue corrupted by the updates so here is another solution - have the Windows 7 OS install dvd handy as this tests for corrupted system files : start > type cmd > right clight CMD select "run as admin" > type or paste the following : SFC /scannow