FIX: Okay I found out the problem as i noticed it was not just Creo that wouldn't install. The problem is something to do with a bug on windows 10. A while back i went on to the windows store for the first time after getting windows 10. I noticed there was a large list of programs I had that were in the update list, just stuck on pending! For some reason they would not install because windows update on my computer is bugged since the windows 10 update. For some reason this was then stopping me download anything else to my computer as windows was trying to finish those first, but they were stuck on pending. I found out to fix this I had to go to the task manager and close the files called msi.exe which closes windows update so it stops trying to download those. Again for some odd reason, every time I turn on my computer, windows update opens and tries to update the same files, gets stuck, hence causing all other programs i try to download on my computer not to download. I realised this was the case for Creo as well, closed msi.exe and bobs your uncle the download begun! So if anyone else was in the same predicament, there's is your answer
Dan