Computer HDD

[Mystik]

There are ton of programs that let you do that quite easily like Lightshot and Gyazo. (ShareX is the best but is pretty advanced)

Without a 3rd party tool:
You can also press Print Screen on your keyboard, then Ctrl+V in paint (or preferably in some other image editing software) and then crop and save the image, and upload to something like imgur: https://imgur.com
Click on "new post" -> drag and drop image or press "Choose photo/video" -> Once upload is complete right click on the image and choose "Copy image address"
Then paste the image URL inside [img][/img] tags on a new post in this thread.

So the raw post should look something like this:

Code:

[img]https://i.imgur.com/nagYVqB.png[/img]