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Ah, thanks for that.

Something else you could try…

1. Open Windows File Explorer and navigate to where you kept your PDFs (Documents folder or similar).
2. With the mouse over any one of your PDF files, right-click and select Properties.
3. From the resulting info box that opens, near the top but below the name of the file it should show the file type and application than opens that file type (if there is one associated). Underneath that is more info on the file itself – location, size, etc.
4. Next to the "Open with…" there should be a "Change…" button.
5. If you click the "Change…" button, it should ask, "How do you want to open .pdf files from now on?" and below that is "Keep using this app" followed by "Other options".
6. From what you have written in your original post, something like "Adobe Reader" should be displayed underneath "Keep using this app".
7. Below "Other Options" does it list Chrome or Edge or something that might be happy to open a PDF? Use the "More apps" option if you want to look at other suggested apps.
8. If you see Chrome in that list, then select Chrome and then OK and that should be the file type association updated to always use Chrome for pdf files.

If Chrome does not handle PDFs in the way that you want and wish to use something from Adobe themselves, as per Biggle’s reply #4, you can download Adobe Reader from here: https://get.adobe.com/uk/reader/ using the button near the top left of the page. No account is needed, no payment is needed, just make sure you did not select the "Install McAfee security" tickbox before downloading. That will download the Reader installer and you can follow the instructions from there. Once completed, the installer should have associated PDFs with Adobe Reader and double clicking a PDF file in File Explorer should now open Adobe Reader instead of Chrome.

But if you can successfully open a PDF with Chrome either by opening Chrome first and dragging and dropping a document onto it or by double clicking on the pdf to open it, then I’d be tempted to leave it at that.

Nothing to apologise for and good to hear McAfee has left you alone.

If you still find Edge being troublesome after following the instructions as per F1fan above to set Opera to the default browser, there are still other things that can be done.

I use Firefox as my preferred browser, Chrome as a backup and Edge if I still have problems (even though Chrome and Edge are very similar underneath). I needed to make a couple of other minor changes to stop Edge from nagging me when it felt like it and it has been quiet ever since but I can still choose to manually update Edge when I ask.

Let us know if it still makes an unwanted appearance and we can look at further options.

I have to question the advice to install "everything from voidtools" - while it may have been provided with good intention, it seems to be aimed at addressing a problem the original poster has not described. Can we stick with the Edge and McAfee issues in the meantime, please?

There's an article here to remove an unwanted McAfee installation - https://www.mcafee.com/support/?articleId=TS101331&page=shell&shell=article-view
If the Windows (de)installer fails to work, then there is the MCPR which should help.

As for Edge, my recommendation is to not attempt to uninstall it but it can be shut up fairly successfully if you prefer to use a different browser. Let us know what you have done so far.