A family of Microsoft word processing software products for creating web, email, and print documents.
There isn't any way to do this automatically in any version of Word, and in any case it's not recommended unless you are using a monospaced font (such as Courier New). What you can do in most versions of Word (and I assume this includes Starter) is this:
- Click on File and then Options.
- In the Options window, choose the Proofing tab.
- Under "When correcting spelling and grammar in Word," click the Settingsbutton.
- Under Require, select "2" for "Spaces required between sentences, then click OK.
- Click OK to exit the Options.
If you have "Check grammar as you type" enabled, I think this will cause instances of a single space after a period to be marked with a wavy green underline. Otherwise, you'll just get a notice when you explicitly run a spelling and grammar check (you must have "Check grammar with spelling" enabled).
In other words, this will not force Word to do anything; it will just serve as a reminder to you, by flagging places where you have the "wrong" number of spaces.