Then you'll need this
I found that the most important part was installing the ADB drivers for the device.
Follow the Nexus Root Toolkit instructions on how to delete existing USB drivers, because you may find that Windows likes to install the USB connected device under MTP. It needs to be in the Device Manager under Android | Android ADB.
I also found that disconnecting the Internet / WiFi on the host PC helps prevent Windows from going out to the internet to search for drivers that will overwrite the USB interface to the Nexus 7.
You will need TWRP from here OR here.
After Unlock and Root with TWRP recovery, then use NRT to install the Net Hunter image. Go here.
For no good reason other than there was an option to do so, I copied the NRT Window Log below:
Nexus Root Toolkit v2.1.9 Masterlists: - LatestToolkitFiles.ini 3135 - AndroidDeviceListFull.ini 3135 - AndroidDeviceListFlash.ini 3135 RAZOR-FLO: Android 6.0.1 - Build: MOB30X Live log initiated [2018-08-08]: Checking ADB/FASTBOOT Connectivity adb devices 09e791fb device fastboot devices + ADB Device Connected Rebooting your device into bootloader mode... adb reboot bootloader Checking Fastboot Connectivity fastboot devices 09e791fb fastboot + Fastboot Device Connected + Confirmed: Bootloader Unlocked. Flashing Custom Recovery to RECOVERY partition... fastboot flash recovery "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Recovery_Custom\TWRP\twrp-3.0.2-0-flo.img" Temporarily Booting TWRP... fastboot boot "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Recovery_Custom\TWRP\twrp-3.0.2-0-flo.img" Checking ADB Recovery Connectivity adb devices 09e791fb recovery + ADB Recovery Device Connected Pushing root files to your device: Pushing "SR1-SuperSU-v2.78-SR1-20160915123031.zip" to your device: adb push "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Root_Files\ SR1-SuperSU-v2.78-SR1-20160915123031.zip" "/sdcard/!ReadyToFlash/ Root_Files/SR1-SuperSU-v2.78-SR1-20160915123031.zip" 100% /sdcard/!ReadyToFlash/Root_Files/SR1-SuperSU-v2.78-SR1-20160915123031.zip Hash verifying file transfer: 627c4b98e7bf83293e81d3758accf753 = Local Hash 627c4b98e7bf83293e81d3758accf753 = Device hash + Verified! Pushing "busybox-signed.zip" to your device: adb push "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Root_Files\busybox-signed.zip" "/sdcard/ !ReadyToFlash/Root_Files/busybox-signed.zip" 100% /sdcard/!ReadyToFlash/Root_Files/busybox-signed.zip Hash verifying file transfer: 0ece645c3ca95a10f9a4344300ce0f8f = Local Hash 0ece645c3ca95a10f9a4344300ce0f8f = Device hash + Verified! Pushing "quick-reboot-signed.zip" to your device: adb push "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Root_Files\quick-reboot-signed.zip" "/sdcard/ !ReadyToFlash/Root_Files/quick-reboot-signed.zip" 100% /sdcard/!ReadyToFlash/Root_Files/quick-reboot-signed.zip Hash verifying file transfer: 64384a4285d14f0727ea989c17c8909b = Local Hash 64384a4285d14f0727ea989c17c8909b = Device hash + Verified! Pushing "openrecoveryscript" to your device: adb push "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Root_Files\ openrecoveryscript" "/cache/recovery/openrecoveryscript" 100% /cache/recovery/openrecoveryscript Hash verifying file transfer: b42ecaae4b4c4d37d3200b874e29366b = Local Hash b42ecaae4b4c4d37d3200b874e29366b = Device hash + Verified! Rebooting your device into bootloader mode... adb reboot bootloader Checking Fastboot Connectivity fastboot devices 09e791fb fastboot + Fastboot Device Connected Temporarily Booting TWRP... fastboot boot "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Recovery_Custom\TWRP\twrp-3.0.2-0-flo.img" Rooting... Waiting for your device... Device Detected Automated Rooting Procedure Complete!
You should see something like this in the NRT Log Window:
Nexus Root Toolkit v2.1.9 Masterlists: - LatestToolkitFiles.ini 3135 - AndroidDeviceListFull.ini 3135 - AndroidDeviceListFlash.ini 3135 RAZOR-FLO: Android 6.0.1 - Build: MOB30X Live log initiated [2018-08-08]: Checking ADB/FASTBOOT Connectivity adb devices 09e791fb device fastboot devices + ADB Device Connected Rebooting your device into bootloader mode... adb reboot bootloader Checking Fastboot Connectivity fastboot devices 09e791fb fastboot + Fastboot Device Connected Temporarily Booting TWRP... fastboot boot "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Recovery_Custom\TWRP\twrp-3.0.2-0-flo.img" Checking ADB Recovery Connectivity adb devices 09e791fb recovery + ADB Recovery Device Connected Pushing "nethunter-flo-marshmallow-3.0.zip" to your device: adb push "C:\Users\SpiFi\Downloads\ nethunter-flo-marshmallow-3.0.zip" "/sdcard/ !ReadyToFlash/nethunter-flo-marshmallow-3.0.zip" 100% /sdcard/!ReadyToFlash/nethunter-flo-marshmallow-3.0.zip Hash verifying file transfer: aede8c474cb73c43205c6426ec23ad5a = Local Hash aede8c474cb73c43205c6426ec23ad5a = Device hash + Verified! Pushing "openrecoveryscript" to your device: adb push "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\stored\openrecoveryscript" "/cache/recovery/openrecoveryscript" 100% /cache/recovery/openrecoveryscript Hash verifying file transfer: 34b17570a68297721a19be80821452cc = Local Hash 34b17570a68297721a19be80821452cc = Device hash + Verified! Rebooting your device into bootloader mode... adb reboot bootloader Checking Fastboot Connectivity fastboot devices 09e791fb fastboot + Fastboot Device Connected Temporarily Booting TWRP... fastboot boot "C:\Program Files (x86)\WugFresh Development\ Nexus Root Toolkit\data\Recovery_Custom\TWRP\twrp-3.0.2-0-flo.img"