Missing or greyed out features in all applications from 365 Personal. Office installed. Tried everything i know. Help.

These screen shots look entirely normal.

The first screen is the "Start screen", which you can completely avoid by going to File > Options > General and clearing the check box for "Show the Start screen when this application starts". It may also be useful to go to the Save page of the Options and check the box for "Don't show the Backstage when opening or saving files with keyboard shortcuts", so you'll get the standard Open or Save As dialog boxes instead of the inefficient "Backstage" pages.

On the other two screen shots, the buttons that are greyed out are for operations that require you to have an appropriate item selected or to have started an operation that isn't greyed out. For example, on the References ribbon, you must insert a table of figures (or a table of tables, etc.) before the "Update table" button will be enabled; the same is true of inserting an index before you can "Update index". On the Mailings ribbon, you must start a mail merge before any of the greyed out operations can be performed.

If you know of any features that are missing rather than simply disabled by not having done a prerequisite function, you may find that you can add them by going to File > Options > Customize Ribbon or File > Options > Quick Access Toolbar. (Note that sometimes it can be hard to find the correct name in the list of commands in those dialogs; you can post here to ask about them.) If the feature really isn't available, post the specific thing you're looking for.

In addition to Stefan's advice, once you have opened the header or footer area by either of the methods he mentioned, the Header & Footer tab of the ribbon will appear. This is one of many tabs that Microsoft calls "contextual tabs" because they appear only when the cursor is in a place where the commands on that ribbon are usable (that is, in the proper "context").

You may already know this, but we get asked about it repeatedly: When the header or footer is active, everything in the main part of the document is dimmed, and vice versa. The only way to see everything on the page in full color at one time is to look at the print preview.

In my previous reply, I was only commenting on the options for ribbon customization.

If you have a locally installed version of Office, of course you can modify the header and footer as desired. Just double-click the header to activate the header/footer view. Or click Insert tab > Header & Footer group > Header > Edit Header.

Once the header/footer view is active, select and delete the content that you want to get rid of.

Which modifications are you trying to make at File > Options > Customize Ribbon? Note that there isn't much you can do about the built-in commands. See https://support.microsoft.com/en-us/office/customize-the-ribbon-in-office-00f24ca7-6021-48d3-9514-a31a460ecb31.

Hi Monique

I am Dave, I will help you with this.

On your screenshots, you do not seen to be logged into Microsoft 365, in Word, go to File - Account

At the top right, if you are not logged into Office, log in, if you are already logged into Office, log out, restart (not shut down) your PC and then log back into Word.