I'M SO HAPPY that everything passed smoothly :-)
Please, follow the next tutorial (try with this ... if it will doesn't works I'll suggest you another)
Prerequisites before you begin rooting your device
1)Make sure you have installed the necessary device driver before moving on. If you have do not so, you can download the device’s driver here:
[Only registered and activated users can see links Click here to register]
2)Make sure you have enabled USB Debugging from your device’s settings.
3)Make sure there is more than 50% battery remaining on your device.
4)Download iroot PC version from here:
[Only registered and activated users can see links Click here to register]
5)Install iroot on your PC by double-clicking on its icon and follow the onscreen instructions. If it doesn’t open, then right-click on the icon and run it as administrator.
6)Connect the device to your Windows-based PC using an appropriate USB cable.
7)Ensure that your PC is able to detect your device before you move on with the rest of the steps. If it doesn’t detect your device, do ensure that you have installed the correct driver on your PC.
8)Open the iroot program on your PC and you should be able to see a screen of iRoot.
9)On the iroot program, click on the ROOT button ( Green button ) to begin rooting device.
10)The rooting process will take only a few minutes to complete. You’ll be prompted by the program once it has rooted your device.
11)The device will then automatically reboot itself.
Congratulation ! You’ve just rooted your device !
AND THEN, I suggest you to install "Root Checker 3.2" apk to verify if your device is rooted.
IF ALL WILL BE WELL, please install "SuperSU" apk too.
I almost forgot : before to install ADB driver, you should try to root your device without install any driver (you've already installed the Acer drivers that I've sent you in this thread) :-)