This is what normally happens.
When I turn on the computer wuaulct.exe is running off the main system svchost.exe, which I can see in
process explorer. When I connect to the internet another wuauclt.exe appears and the
cpu is used 25%
with svchost.exe for at least a minute before I get a windows update pop up message
from windows update.
Only this in most cases seems to happen at a random time when I am not installing an update, and
the windows update tray icon isn't there. As far as i know wuauclt.exe is always there
when the problem occurs, and wuaueng.dll is the main dll being used at around 25% when it happens.
Now i'm not really sure but believe this may be happening becuase windows update had previously
downloaded several windows defender updates automatically but without installing them, which I did not install later and asked windows update not to notify me again.
So a few days ago I set the updates to 'notify me but don't automatically download or install them', and the reason for this is because whenever I install a windoews defender update using windows automatic updates a restore point is created named Software Distribution service 3.0
And with this happening every few days I lose hard drive space. So I now download windows defender updates as a file manually on a microsoft site.
So now I am thinking, maybe all of the updates for windows defender (and outlook) that were downloaded but not installed are slowing wuauclt.exe (windows update down),and perhaps causing it to use
cpu at random times. i don't use outlook, so i wasn't don't downloading the updates.
I then asked windows update to 'offer updates that i have previously hidden', and svchost.exe
used to 25% (anolther wuauclt.exe ran, and wuaueng.dll was used) like all the other times lol.
It just kept popping up to install these outlook updates even though I was not downloading them and asked them to stop notifying me, they had different KB numbers for each but looked like the same file. Microsoft is probably recognising I have the software, but not the updates. So i installed one, and the problem has not occured since yet.
(in the screenshots the read and green '.msp' files keep showing and then dissapearing quickly loads of times for about a minute till svchost.exe has stopped using the
cpu- even when updates are not being installed or downloaded)
thanks, jake
