New
#1
Welcome to the forum,
Does File Explorer have all it's defaults like this?
Default Apps - Choose in Windows 10 - Windows 10 Forums
yes
OK, can you right click on one of the .zip files and choose open with,
Default Apps - Choose in Windows 10 - Windows 10 Forums
If File explorer is not selected already like this,
Click on the more apps and see if you can select it from there.
You might also want to try resetting the default application for the .zip filetype
Default File Type Associations: Option Two
Scroll down to zip Compressed (zipped) folder