I have two Windows 7 machines that have completed all work units. Both are stuck at "uploading", and are not retrieving new tasks.

A non-Windows computer has reported completed work units since the Windows computers stopped working.

I updated one Windows client from the last version to the current version 7.6.6 with no change to the stuck uploading status. This was for Computer ID 2314530.

The server status page also seems to be stuck at "29 Aug 2015 23:25:15 UTC" and is not updating every 10 minutes.

https://boinc.bakerlab.org/rosetta/rah_status.php

While I didn't see any other posts about this problem before I made the post above, I found this other post from 18 hours ago in a later search:

https://boinc.bakerlab.org/rosetta/forum_thread.php?id=6701&nowrap=true#78619

One of the RAH servers was apparently hit with a power outage over the weekend. You happen to be the first person to create a dedicated thread about it - it has been mentioned in a few other threads though.

Just sit tight, once things are restored the completed results will properly upload.

Things got a bit intense in Seattle this weekend:
http://o.www.seattletimes.com/seattle-news/weather/one-person-killed-thousands-lose-power-in-windstorm/

DK is working on restoring Rosetta@home, should be back shortly!