How to update on windows 10?

Question

Windows

Good afternoon.
I now have "dishonest" windows 7, I would like to upgrade to windows 10. I would like to clarify a number of points:
1) Is it possible to upgrade from such a seven to ten, and then just enter the license key?
2) 7 will be automatically deleted, or will there be 2 Windows and will you have to delete it yourself?
3) What will happen to the files on the system disk and the set of drivers?
4) Will the Word need to be bought separately or is it free? If not, is there any cut down free or trial period?
5) Does it work normally?

Answer 1

1) yes.
2) there will be one, the other will remain for rollback, you can delete it through disk cleanup
3) they will remain
4) Word always costs money. There is a test period.
5) ok.

Answer 2

Hurry up
Windows 10 can be activated for free if you are...