Why does Blender Video Editing not work on my system?

Dr
1

Little question regarding blender and video editing. Every time I load a video and for example crop a picture, the preview disappears. This happens both in version 2.8 and in the previous version.

The avi.-file is not big at 500 MB.

My system is the notebook MSI GP70 2PE Leopard with a GeForce 840M. Graphics card drivers are up to date.

I'm grateful for all the tips.

Edit: The operating system is Windows 10

Co

Probably your hardware is overwhelmed.

Blender needs a lot of resources.

Optimal

64-bit eight core CPU
32 GB RAM
Full HD displays
Three button mouse and pen + tablet
Graphics card with +12 GB RAM

Recommended

64-bit quad core CPU
16 GB RAM
Full HD display
Three button mouse or pen + tablet
Graphics card with 4 GB RAM