Message says - The office product necessary to open this file is not installed on this computer..... what do I do?!

I have had my laptop for 18 months which came with Office pre-installed.  It has worked fine until today when I try and open a word or excel document from the desktop the above message comes up.  All icons have changed and I can no longer open documents from windows explorer.  I can open documents directly from Excel or Word.  What has happened, why now and what can I do about it?

Many thanks
Answer
Answer
Stefan Blom
MS 365 Word MVP since 2005
Volunteer Moderator
MS 365, Win 11 Pro
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Note that I do not work for Microsoft
https://mvp.microsoft.com/
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Please specify Word version & OS in your question

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Last updated January 7, 2024 Views 5,164 Applies to: