Windows 10 free upgrade from Win 7 -- crashing iMac

I have the latest version of Parallels 11 running on a iMac. I want to upgrade windows 7 to windows 10. I downloaded the media creation tool and followed the instructions. I have a slower internet connection and it takes over 8 hours to download the Windows 10. Last night I started it before I went to bed. When I got up in the morning it was not running and I could not any trace of Win 10. So I started it again this morning and was at my computer late this afternoon when the download finished. It went thru the "preparing" stage then my computer crashed and shut down. There was a message that said it shut down unexpectedly. When it turned back on no trace of the 8 hour download and I was back step 1.

I don't really want to try the download for a 3rd time.

Is there something else I can try?

 

Hi Randall, we suggest you to raise a support request at, https://www.parallels.com/products/desktop/support/request/