Hey gates52,
We'd be happy to help out. While it's unclear what might be going on here, we'll do all we can to help you find a solution. If you've reset your Apple ID password and can login successfully on iCloud.com, then you know your Apple ID credentials are correct.
With that in mind, if having issues with iCloud for Windows, you might need to uninstall it and reinstall it.
For help uninstalling it, please complete these steps:
Uninstall iCloud for Windows if you have Windows 10
1. On your Windows computer, sign out of iCloud for Windows.
2. Choose Start menu > Settings > Apps > Apps & features.
3. Locate iCloud, click Uninstall, then follow the onscreen instructions.
4. If you also set up iCloud Mail in Outlook, locate iCloud Outlook, click Modify, choose Remove, then follow the onscreen instructions.
This is outlined further here: Sign out of or uninstall iCloud for Windows - Apple Support
Once uninstalled, restart your PC and redownload and install iCloud for Windows using these steps and just make sure you're using the exact same Apple ID email address and password that you used to login to iCloud.com: Download iCloud for Windows - Apple Support
We hope this helps out.
Take care!