Hello! I understand you're getting a persistent login popup message from the Currys Cloud Backup app after changing your password, and it's not accepting either your old or new password. Let’s try to get this sorted out together.

To start, could you tell me if this popup appears immediately when you open the Currys Cloud Backup app or does it show up during backup operations? Also, have you tried restarting your computer since changing the password?

Meanwhile, here’s a simple step-by-step approach to try:

1. Sign Out and Close the App:
Fully sign out of the Currys Cloud Backup app (if possible), then close it completely. Make sure it’s not running in your system tray.

2. Restart Your Computer:
Restarting can clear any cached login credentials that might be causing a conflict.

3. Clear Saved Credentials on Windows:
- Press Windows + S and type "Credential Manager" and open it.
- Look for any credentials related to Currys Cloud Backup or Livedrive.
- Remove these credentials to ensure your system prompts for fresh login details.

4. Open the Cloud Backup App and Login Again:
Use your new password carefully. Avoid copying and pasting to prevent accidental spaces.

5. Check Network Connection:
Ensure your device is connected to the internet and not behind strict firewalls or VPNs that might block authentication.

If these don't resolve the issue, it might be related to the app’s stored session tokens not resetting after your password change. In that case:

- Look for an option in the app’s settings to “disconnect” or “unlink” your device from your account, then log in anew.
- Alternatively, uninstall the Currys Cloud Backup app completely, reboot your device, and reinstall it. Then try logging in with your new credentials.

Does any of that help or do you see the same login request pop up again? If you’ve already tried some of these steps, please let me know which ones, and we can go deeper into the problem.