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I would like to change the default file association of .xlsx with a script. I tried to change registry entries or with the command. 

ftype <Name>="<Path>"
assoc .xlsx="<Name>"

But it doesn't seem to work. I would like to open the file with a .cmd script and start excel later on from there.

HYC Media
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  • You might first try to delete the registry key of `HKEY_CLASSES_ROOT\.xlsx`. Suggest to Export it for backup. – harrymc Dec 06 '19 at 10:40
  • @harrymc thanks. It changed the entry if you look it up with `assoc .xlsx` but it didn't work either when opening the file. – HYC Media Dec 06 '19 at 10:56
  • Try to follow [this answer](https://superuser.com/a/1369178/8672). If it doesn't work for you, try to do it via the "Open with" context menu, then check what has changed in the registry. – harrymc Dec 06 '19 at 12:12

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