I will try to structure the question as best as possible
Description: Today I turned on my computer and for some strange reason when i open the motzilla i could’t do nothing, the entire computer was frozen except the motzilla itself, which worked great, then I was forced to turn off the computer because after waiting 15 min remained the same. When I turned it on again things have changed, now everything works, but when I open any program I can not close it, as I say, the program goes perfectly, the rest of the system is also great but I can not close any program . (ubuntu worked well yesterday)
Here I will leave a video for you to see-yourself:
https://youtu.be/s7CqAsF4u2M
I would like to warn that I am a very new user in ubuntu and in linux in general, here I leave some data that could be of help:
I have ubuntu installed next to windows 10
Ubuntu version: 16.04 LTS
Hardware:
CPU: Intel Core i7-6700K 4GHz
GPU: Gigabyte GeForce GTX 980 Ti Xtreme OC WindForce 6GB GDDR5
MOTHER BOARD: Asus Maximus VIII Hero
RAM: G.Skill Ripjaws V Red DDR4 2400 PC4-19200 16GB 2x8GB CL15
Thanks in advance for your help.