Downloads here (if needed):
Download USB Drivers if you need them (Windows)
Download file which contains the .bat you need to run.
Once you’re done with the above (if root is still not working, please proceed ahead):
1.) Go to the folder where you extracted the fsdebug tool and type:
adb push Superuser.apk /sdcard/Superuser.apk
2.) Then using a program like ES File Explorer, browse to /sdcard on your TF Infinity and install the Superuser.apk file – it will ask you to replace it which you’ll want to do.
Voila – once it’s done go ahead and test root. To test I went to the market and downloaded and installed busybox.