Blank screen Ubuntu 15.04 update with NVIDIA driver (nomodeset does not work)

After updating to Ubuntu 15.04, the screen goes blank when I boot Ubuntu with grub2. I have tried most of the posted solutions (adding nomodeset, changing quiet splash to no splash) but to no avail. What can I do? (I can't access ubuntu's terminal, but I do have access to Windows10)

When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0 parameter to the end of the linux line ... Then press F10 to boot.

When the login screen appears press Ctrl+Alt+F1.

Enter your user name and password.

Identify your NVIDIA graphics hardware by executing:

lspci -k | grep -EA2 'VGA|3D'  

Uninstall every NVIDIA related software by executing:

sudo apt-get purge nvidia*  
sudo reboot

When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0 parameter to the end of the linux line ... Then press F10 to boot.

When the login screen appears press Ctrl+Alt+F1.

Enter your user name and password.

Install the NVIDIA drivers by executing:

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-*
sudo reboot  

Note 1:

As you did not provide any information about your NVIDIA graphics card check drivers versions.
Replace * with the latest stable main version number (e.g. 355) that supports your NVIDIA GPU.

Note 2:

When you have switchable graphics cards install nvidia-prime (NVIDIA Optimus support) as well.

Note 3:

If you ever have had bumblebee installed before to switch between graphics - also remove this.