Word, Photoshop, Illustrator–there are certain programs that are essential to each profession.

Microsoft Office is one of those products that you pretty much have to have if you work with documents. This is the non-subscription version, though you can also get Office 365 if you’d prefer.
Adobe has pretty much cornered the market on graphics programs. Elements is basic program for image manipulation and will handle most of your everyday graphics needs.
Kaspersky is one of the premier antivirus software suites available. Highly recommended.
Scrivener is used by a lot of people for both writing and also formatting e-books.