your stup couldn't start because your username or password is incorrect

Hello greg1972gh,

Welcome to the Apple Support Communities. It sounds like the iCloud For Windows application is not able to be set up because it states the username and password is incorrect. You've reached the right place.

Here are some suggestions depending on what is happening:

• If the error message is referring to your Apple ID, check this website on a browser on the PC to see if you can login: iCloud
  • If you're unable to login here, try resetting the password: If you forgot your Apple ID password - Apple Support
• If this is the username and password for your Outlook account, verify you can login using their webmail.
  • • If you have issues here, try resetting the password: Reset your Password - Microsoft
    • If you need further help, reach out to Microsoft directly: Contact Us - Microsoft Support
• These steps can help with setup and other troubleshooting with iCloud for Windows: Get help using Outlook with iCloud for Windows - Apple Support

Best regards.