If you're on a computer for much of the day, downloading files is likely to be a regular part of your workflow. That could be from an email attachment, a messaging app, or through a web browser.

Some users experience iCloud Drive Windows sync problems, usually fixed by clearing space in iCloud, restarting, or checking account details.

If you have a file on your computer that may have been downloaded from the internet or copied from some other computer, then when you try to open it, you may receive a warning. Windows has blocked ...