Sketchup 2017 crashes just after i create a component,
I have installed Pro on my new desktop, all works fine apart from component creation. I can
use components out of the component library. It only happens just after creating a component.
Did You install app by right clicking on the installation file and choose run as administrator? If not the ghost of x-mas past may be haunting your version of Sketchup. Strange things will happen.
Yes, this is my suspicion as well - an extension is detecting the created components and doing something that causes a crash.
To @geelanfab you can disable extensions (without permanently removing them) using the Extension Manager window, accessed from the Window menu. Try disabling any recently-installed extensions, quitting out of SketchUp (for good measure), restarting SketchUp, and checking the behavior.