The KB3020369+KB3172605 fix is supposed to fix slow or broken Windows Update in Win 7, esp for a clean install. Seems, since late Jan 2017, M$ have fixed or "unfixed" this problem which started in Aug 2015, ie just after the launch of Win 10 and the 1-year free Win 10 upgrade offer to Win 7/8.1 users = a dirty tactic to push Win 7/8.1 users onto Win 10.?
....... So, Win 7 users may no longer have to apply this fix in order to get Windows Update working normally again. If not, no harm in applying the fix.
Personally, I bought a new OEM Win 7 laptop in 2013. From 29 July 2015, I rejected the free Win 10 upgrade offer by hiding GWX KB3035583 and related updates. Windows Update ran smoothly until it became broken in April 2016, ie the same time when M$ aggressively sneaked the Win 10 upgrade onto Win 7/8.1 computers by hiding GWX KB3035583 inside the cumulative update for IE 11, KB3139929. I had to manually install security updates, one-by-one, via M$ Update Catalog or Download Center. In Aug 2016, I stopped manual updating and moved to Linux on an external HDD.
....... "Miraculously", in Feb 2017, my Windows Update got going normally again and with Windows Update I installed only the remaining security updates for Aug and Sep 2016 because of M$'s imposition of mandatory monthly Patch Rollups from Oct 2016 onward. Fyi, I have just hidden the March 2017 Patch Rollup and MSRT in Windows Update.
P S - During the last year of the life of Win XP, ie in 2013 and 2014, the Windows Update/M$ website for Win XP was similarly affected, ie slow or broken updating = to push Win XP users onto Win 7/8.1.? Later, the problem disappeared.
....... In 2015, I received an old HP desktop computer with Win XP SP2 installed. I had no problem updating thru the Windows Update/M$ website and then updating to SP3.
P S 2 - Bear in mind that M$ can do anything with Windows Update in a Windows system at any time, eg slow it down or break it temporarily or permanently. Eg M$-Windows Update will not be supporting Win 7/8.1 for new computers with the Intel Kabylake and AMD Ryzen chips, even though EOL is in 2020/2023. Windows Update may be a malware and/or ransomware.
Edited by anorkneemerse, 19 March 2017 - 12:15 AM.