HA! now I'm 100% certain that I was right!
Something is broken.
Today I start to download updates again by WSUSOU to refresh update if some new appeared.
And i had this same situation in downloading updates like in installing updates!
ENTER key (i don't know reason why) helped and now i know this 100%.
It no any coincidence.
I make this screen on 12:59:
Like you see cmd state was hanging for about 20 minutes from 12:40-12:59.
Then after i make screen i hit ENTER once(only once) and cmd state ALIVE! really.
I was angry that i didn't record it on camera.
like you see cmd hang on:
the line: "12:40:54,40 Determined dynamic update urls xxxxxxxxxxxx"
I hit ENTER on 12:59+ and first line in "cmd window" after that was
the line: "12:43:20,11 Done."
and then the next line was from correct time 12:59+
and then next lines and rest off the download process to the end was with no problem.
i will tell this again, ENTER helped in some way. If your update/download process hang long time than hit enter(or maybe any key).
And this worked on win7x64(laptop) and win 10x64(PC) so it isn't possible that is coincidence.
Next time i will remember to record it on camera.
The strange was that the after i push Enter on 12:59
first line appear on different time : "12:43:20,11 Done."
and than next lines immediately correct time 12:59+.
so like I sad earlier this look line cmd windows hang/don't refresh correctly.
I add you the part of log file:
08-01-2016 12:38:12,38 - Info: Verified integrity of existing updates for ofc glb
08-01-2016 12:40:53,90 - Info: Determined static update urls for ofc glb
08-01-2016 12:40:54,40 - Info: Found valid list of superseded updates
08-01-2016 12:59:31,54 - Info: Determined dynamic update urls for ofc glb
08-01-2016 12:59:36,77 - Info: Downloaded/validated 4 statically defined updates for ofc glb
08-01-2016 13:00:10,49 - Info: Downloaded/validated 226 dynamically determined updates for ofc glb
08-01-2016 13:00:12,98 - Info: Cleaned up client directory for ofc glb
08-01-2016 13:00:12,98 - Info: Removed NTFS alternate data streams for ofc glb
08-01-2016 13:00:24,79 - Info: Verified digital file signatures for ofc glb
08-01-2016 13:00:33,64 - Info: Created integrity database for ofc glb
08-01-2016 13:00:33,67 - Info: Ending WSUS Offline Update download for ofc glb
I have hope this will help to finally reaper this problem.
This hitting enter helped me with installing and downloading updates on 2 different systems and configurations.