Help Can not access memory vis USB in Windows post upgrade to Android 4.1.1

[sl0w]

I am no longer able to access the "USB Storage" device in Windows after upgrading to Android 4.1.1.
I have a Galaxy Nexus S 4G.
Prior to the upgrade, I could plug in my phone, enable USB Storage, and navigate my phone's folders in Windows.
I'm no longer able to do this... any ideas or suggestions would be appreciated.

 

[Knocks]

Sounds like it's missing a kernel module. Do you have fast charge enabled?

 

[sl0w]

How do I check on that?

 

[sl0w]

to answer your question, no. I have not flashed my ROM.
It's still on factory settings...