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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(243.2, 91%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ED%3C/text%3E%3C/svg%3E)
some help said I could use assoc to set the association - doesn't help. (for json either, which is more standard, but really I want to associate text files that end with .jsox with notepad)
Edition Windows 11 Pro
Version 25H2
Installed on 11/10/2025
OS build 26200.7623
Experience Windows Feature Experience Pack 1000.26100.275.0
Seems I used to be able to do this - why doesn't notepad want to open the file with an association?
I can easily just type 'notepad blah.jsox' and it opens just fine.
Answer accepted by question author
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(291.2, 38%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMP%3C/text%3E%3C/svg%3E)
Follow https://learn.microsoft.com/en-gb/answers/questions/5701520/windows-11-notepad-issues
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hth
Marcin
