The Creative Cloud desktop app displays a black screen at sign-in.
1. Start the computer with "Safe mode with networking"
Steps to boot with Safe Mode with networking can be found below :
Windows 7 :
Windows 8 :
http://windows.microsoft.com/en-us/windows-8/windows-startup-settings-safe-mode
2. Launch the Creative Cloud desktop app and validate.
3. Restart the computer.
Sign in to your account