When you come upon the Internet Explorer’s error “File couldn’t be downloaded”, it is most likely caused by “Do not save encrypted pages to disk” option being enabled.
This is how I solved “File couldn’t be downloaded” error in Internet Explorer:
- Open Internet Explorer
- In menu go to Tools -> Internet Options
- In the window select tab Advanced
- Scroll down do Security section, remove tick from Do not save encrypted pages to disk and hit Apply/OK.