There is quite a bit of information in the log and it will take me some time to try to find something that might help. So I will look some more tomorrow, but for now, it looks like the progress stops at 62%, as you state, and the last thing it was doing was related to Epson scan.
If you have a scanner installed, you might try removing it to see if it helps, but I am just guessing.
Are you running an Anti-virus like AVG? Sometimes they can mess up an install.
I'll check back tomorrow....