Every time i start the game it crashes to desktop please help me if you know what to do.

With zero information about your system, you're bound to get zero help. Test your hardware stability.

My system:
GPU: GeForce GTX 750 Ti
CPU: AMD FX-6300 Six-Core Processor
memory: 8,00 GB RAM (7,98 GB usable)
current resolution: 1920 x 1080,30HZ
driver version: 352.86
operating system: Microsoft Windows 7 Professional

Check in your Witcher 3 installation folder crash logs. They are in /bin/x64 subfolder. You can tell Windows to open them in Notepad.

Inside there is a line Crash reason:

If the reason is EXCEPTION_ACCESS_VIOLATION (3221225477), Error reading location 0xad8215e4

or similar, then so far is no help for this.

General help:

Sometimes it helps to lower GPU speed
Sometimes it helps if Witcher is installed at C:
Sometimes older, GTA V optimised version of GPU drivers helps

Sometimes only future patches will help.

WIshing you luck

I have checked the chrash "reasons" and one of the most was:"witcher3.exe_crash_20150421_190405528.crashinfo

Some other guys online told me to turn the graphic down but it crashes before i can do anything ingame...

If I start the game and spam spacebar i enter the menu then i can spam enter and the cutsene starts(the one with yenefer riding) and after this cutsene the game crashes to desktop again... some helpful ideas?

Ps.Thanks enistil