I think you are OK for a further 5 years trying update your suite before Adobe puts in all out there for all other Adobe account users to use. There are too many small firms not wanting to use the cloud at the moment and Adobe knows this now and is willing to provide backup according to one of my friends who works through in Edinburgh in their support centre. However don't know how to solve your problem I only update Illustrator & InDesign and both updated fine. My only suggestion can be did you right click the download and "Run as administrator"?