
In my test, I found that the 32-bit Edge won't work if you install it on a 64-bit Windows with 64-bit Edge installed. After installation, I can't find the 32-bit Edge and if I open Edge, it still shows 64-bit version.
But if I install 32-bit Edge on a 64-bit Windows without 64-bit Edge, it will work.
I think you can't install 32-bit Edge on 64-bit Windows if it already has 64-bit Edge installed. Besides, it's not suggested to install 32-bit Edge on 64-bit Windows. You should use the corresponding version to the Windows.
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Regards,
Yu Zhou