I just downloaded a stock eps vector and with Illustrator 2023 installed, I'm getting a message in the Windows 10 file association utility that there is "no app associated with this file" on this computer and provides a link to the Microsoft store.
I opened illustrator and dragged the file icon into the program and it opened as a raster file and could not be expanded. As a work around, I dragged the file over the Acrobat icon - it opened - and I saved as pdf and reopened in illustrator and it worked. Is there a better way?
Have you tried to re-associate EPS files to Illustrator? Easiest way is to select a file, right-click on it and select Properties. If Illustrator 2023 is not currently set as "Opens with", select Change and do it there. If for some reason, it's not listed, click More Apps and navigate to the Illustrator 2023 program file.
Not sure why in your situation it has become disassociated in the first place, tho.
btw: the reason dragging it to Acrobat worked is that essentially invokes Distiller to convert the EPS to PDF. This is not the same as opening it natively, so try and fix your associations.