You are running out of (temporary) disk space most likely. do a bit of housekeeping.
I had thought the same, and did clear my SSD drive off on C:. Got back 10 GB and still fails.
(but yes was hoping that was it) unless it wants more than the 13GB i have on SSD for doing this.
I wonder if it is because at one point I had Photoshop CS5 installed? It seems not there now, and i used the cleaner and still have 10GB on C drive and over 100GB on the drive I am installing too. This is painful