Angels have the Phone Box
Hi Thenin and welcome to Tenforums.
Probably the best thing to do right now, is download what you need, and throw in an empty drive, disconnect all other drives, and clean install W10, then use your W7 key to activate it once you get to the desktop. Also, skip checking for updates at the beginning of the install, because the servers are being hammered now, and you'll just sit there idle, while nothing happens.
If you must review the failure log, it can be found at
You'll need to show hidden system files to find it, and you'll need to copy it to someplace else in order to open it.
7:45 to go. No time to lose.