"Networks and Emails revision": HTML5 Crossword

Across

2. share these when using a network (8)
5. press this to take a screenshot (9)
6. internet explorer is one of these (3,7)
7. amount of devices needed to have a network (9)
11. add these to emails (11)
12. put this in so the computer knows who’s logging in (8)
15. shortcut for paste (8)
16. a web browser provided by Google (6)
17. something that pretends to be something good (6)
18. powerful computer that runs a network (6)
19. store a file to disk so it can be retrieved later (4)

Down

1. used when searching online (8)
3. make a duplicate of selected text or images (4)
4. worms go through these to access your computer (17)
8. used to keep an account secure (8)
9. bad software meant to mess up a computer (7)
10. how to behave online (10)
13. do this before closing email (7)
14. use these for organisation (7)