If I click on a DOCX file, it always opens in LibreOffice.

OldGrantonian said:

Footnote: I like to keep LibreOffice installed and updated, so I can practice occasionally in case MS stop supporting Office 2010.

You could use LibreOffice Portable to avoid interference like this.
2010 does not fully support docx, so maybe that is why LO takes over.

Unfortunately, officially supporting formats do not guarantee, they can be opened properly. Like my office docx can be opened in anything, but openoffice shows an empty document, libreoffice opens it broken, etc.

You might try other office suites, which are more compatible with Microsoft formats, like WPS or FreeOffice.

TairikuOkami said:

2010 does not fully support docx

What is that supposed to mean?

Denis

Try3 said:

What is that supposed to mean?

Open a document in an earlier version of Word - Word

I'm sorry but that article does not include your astounding claim.

Docx format was introduced with Office 2007 and remains the standard Office Word format.

Denis

OldGrantonian,

This is a public forum where many people contribute. It is natural for different people to have different opinions.

You have a file association fault. You will only fix it by focussing on that fault not by going off on some wild goose chase.

OldGrantonian said:

If I click on a DOCX file, it always opens in LibreOffice

That is the fault. That is what to focus on. As a start, consider these checks -
1 Consider Windows faults
1.1 Check the file association records at Settings, Apps, Default apps, Choose default applications by file type - set the same ones that I have set

1.2 Run SFC - TenForumsTutorials
2 Consider Office faults
2.1 Repair MS Office
2.2 Reinstall MS Office
2.3 Uninstall LibreOffice then, possibly, Repair Office again then, if you want to, reinstall LibreOffice being careful to use custom install options so that you can tell it not to set any file associations.

OldGrantonian said:

Footnote: I like to keep LibreOffice installed and updated, so I can practice occasionally in case MS stop supporting Office 2010.

Office 2010 will be supported until 13th October 2020.

Denis

I have several versions of Microsoft Office running [on different computers] and it is Version 2003, XP/2002 and 2000 that need the Compatibility Pack to be able to work with the newer .docx, .xlsx, etc. file formats of Office 2007 and later.

I also keep LibreOffice on all computers due to its wide list of formats it can work with but do need Microsoft Office now and then for sharing files with clients.