Cubase8 kills MS Windows Short-Cut

Cubase8 kills MS Windows Short-Cut.
I have a program that I make a Windows Short-Cut for. After I launch Cubase8, the Short-cut doesn’t respond.
I made the short-cut keys Ctl+Shit+F. Cubase8 has no already used short-cut for this.
With 7.5 Version, I had have no trouble with the short-cut to use.
Even though I finish Cubase8, the short-cut doesn’t work any more.