USB ports not working after OSX 10.9.1 update

I have a late 2011 MBA 13".
The 2 USB ports stopped working as soon as I updated to 10.9.1.
I tried zapping PRAM and resetting the SMC.
I even turned the thing off for hours and still nothing.
Any idea how to fix?
Everything was fine until I did the update.
Thanks.

This is not a known bug affecting 2011 MBA computers with 10.9.1 so there is something wrong with your installation. Since zapping PRAM and resetting the SMC did not work I suggest that you try one of two things but first make sure you have backed up your computer.
1) download Mavericks and reinstall it. Sometimes an update goes awry and a reinstall fixes it. Since doing this won't disturb any of your data or applications it would be my first choice. You'll be downloading 10.9.1 so you won't have to perform any updates.
2) boot into the recovery mode, erase the hard drive and then download and install Mavericks. Once Mavericks is finished installing you'll be asked if you'd like to migrate data and applications from a backup. Say yes and if your backup drive isn't already connect it, do so. Select your applications folder and account folders from the list and let the Setup Manager do its magic.
BTW - this is why one of my several backup hard drives is a cloned backup using Carbon Copy Cloner (SuperDuper! Is another good choice). I can boot up my computer using this backup and download the newest version of Mavericks on it if I haven't already done so. I always quit the installer first and make a copy of it because the installer program deletes itself once it is finished which is something of a pain. It gives me more options including being able to boot my computer with it, erase the computer and copy the installer to the computer rather than having to perform the download all over again if step 1 fails. Since I always download a new copy of the OS when Apple releases an update this computer will have the newest version of the installer so I also can skip the download step of option 1 and just copy it over and install on the computer.

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com.apple.driver.AppleMikeyHIDDriver    124
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