Empty trash not working

I have 2011 MacBook air and I tried to empty the trash, and only one file wouldn't delete because 'the file is still in use', but the application was turned off.

So then I went to finder and clicked secure empty trash, which then proceeded in emptying, but it stayed that way for a long time so I clicked close. Then, it did seem to close, but then didn't and was stuck in deleting. At that point the Air's fans began to crank up full speed and became extremely hot. I tried to turn off but didn't work so I just put it to sleep at the moment.

I'm new with Mac ( in fact this is my first Mac) so I had no clue what to do. In windows I just do ctrl+alt+delete but what should I do with Mac to close the frozen command ( in this case secure empty trash). I got scared bc of the fans and the heat. What should I do? I would appreciate some advice. Thank you.