Help - how to restore backup set on fresh windows install

Can someone help?
I re-installed windows and re-installed norton. However I can’t access the backup set from Windows - there is nothing - it asks me to create a new backup.

When i browse my backup sets via the website, i.e goto “My protection > Cloud Backup > Select my PC > Download the file i want”, the download speed is 40KB/s!!! Why is it so slow?