What is the difference between a UPGRADE Windows Vistaa and NON UPGRADE Windows Vistaa?

How do I know if my upgrade from Windows 8 to Windows 8.1 has occurred successfully?

• My laptop was running on Windows 8 and then I chose to upgrade to Windows 8.1 , the download file size for upgrading to Windows 8.1 was about 3.46 GB and I disconnected my Internet connection when only 51% of the download was complete, assuming that the remaining 49% would be downloaded later on , when I reconnect to the Internet the next time,but to my surprise, I was given a prompt telling that the system would restart in order to upgrade to Windows 8.1, and it did...right now if I go to My Computers and see the OS I am running it shows that it is Windows 8.1 Pro and the look and feel of the OS has also changed from Windows 8 to Windows 8.1,but I am perplexed , because I know that 49% of the download was still remaining,...how is this possible,,and if I go to "Check for Updates", I dont find any updates, so how do I get to know if my Upgrade is complete and successful, Windows 8.1 seems to be working fine, but I would also like to know how to downgrade it back to Windows 8 just in case

• Answer:

  Kudos bro! Your OS has been upgraded to Windows 8.1. You don't need to worry anymore. No idea how it's been completed but it is as it's showing in the My computer. Now you just be aware of the remaining updates, whenever it asks for any, follow it and do it.