I don't know if this would help but when I did the Anytime Upgrade on my A9 I used a USB drive with Win7 set for Home Premium [see this url for reference http://tinyurl.com/msmorz
]. I took about a half hour (if that) to complete the process. I wish now that I documented the process but just wanted to get it over and done with at the time.
I wonder if there is a problem with network communications causing the 38% stoppage. Even at that, the Port Replicator might not work because it needs drivers to function.