You can try to get the fastboot drivers working and flash CWM with Junkies AIO tool then flash the root zip from there

[GUIDE] N00B Friendly OTA JB Install - Updated 7/14/13

Full directions on how to regain root after going to 4.1.2 in that guide

 

I didnt say to root with the tool. I said to use fastboot method to flash CWM, Once you get CWM on your phone you can flash the root zip

 

read the links i provided you. If you read through them all it will get you up and running

 

yea download it and put on your sd card then go into CWM and choose install from zip

 

Then use junkies tool over on the recovery options (on the right side) click fastboot and cwm, and flash it with his tool. if fastboot doesnt work click the link for getting fastboot to work i gave you

 

did you use unmodified root or unmodified no root?

If you used unmodified root can you do us a favor before you fastboot cwm and grab a copy of the stock recovery?

In cmd in windows or terminal in linux/mac:

Code (Text):

1. adb shell
2. su
3. dd if=/dev/block/mmcblk0p13 of=/sdcard/b11_stock_recovery.img

If adb is working for you, you can also use it to flash cwm to the phone by putting the cwm recovery image on your sdcard (make sure it named the same as your command) and doing the following:

Code (Text):

1. adb shell
2. su
3. dd if=/sdcard/recovery.img of=/dev/block/mmcblk0p13