Adobe Premiere Elements 14 with Windows 10 with software lock issues

I wanted to ask for Adobe Premiere Elements experts, because despite being equipped with Intel Core i7, the Nvidia Gt740 M video card, an external drive running on 2TB, Premiere often crashes. In addition to having a very slow rendering, even if I apply only 2 effects, I'm very tired to modify my GO PRO videos even though they have previously been converted to GO Pro Studio in AVI. When they start a new project using AVCHD Pal 1080p50. The original videos have 50 fps. I would like to understand what error does .... thank you

Antonio