Hello, i have some problem

I went on holidays with my laptop, and no one used my desktop computer.
When i wanted to launch nasomi back at home, it had some mini feezes while in the menu and during character selection, but in game it was worse. So i came into my MH to avoid a crowded place, rebooted my comp, then i uninstalled nasomi and installed it back, took the new launcher etc.
I have the same problem

29/30 fps, then a freeze and 5 fps... and back to 29
Here is a video taken this afternoon when i logged on, but it's really the same right now...
https://www.youtube.com/watch?v=fy50TC_XkfQ&feature=youtu.be