Can't sign in to iCloud app on computer

Hi there AuntLova,

For help with any error between iCloud and Windows, there are several steps to walk through that could help. Start with the ones in this Apple article: Resolve issues between iCloud for Windows or iTunes and third-party security software

Test your security software

If you still have trouble after you test your connectivity, your security software could be interfering with your computer's connection with iCloud for Windows or iTunes.

In some cases, it might be necessary to temporarily remove your security software to isolate an issue. Some Internet security apps don’t uninstall completely, so you might need to download and run a cleanup utility for your security software for it to be completely removed.

Work with your security software provider to allow the complete list of ports and services that Apple products use or if you need help with uninstalling their software.

If the error message was something specific, reply back with those details. If it was just a blank error notification, you'll need to start narrowing down the issue with going through all the information in that article. Reply back with how it goes.

Best regards.