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Allow iTunes in the Windows firewall on PC
When the Windows firewall is turned on, it may prevent iTunes from accessing the internet unless iTunes is listed as an exception.
On your PC, go to Start > Search, then search for Windows Defender Firewall.
In the sidebar, click “Allow an app or feature through Windows Defender Firewall.”
Click the “Change settings” button.
Select iTunes.MSI and the Private and Public checkboxes (so they have a checkmark).
Click OK.
If you’re still having difficulty, visit the iTunes Support website.
See alsoHow iTunes is changing on PC