Windows10 not able to download update from WSUS
Solution 1:
Try the following steps to reset windows update related services and folder.
First launch CMD as administrator and run the following to stop Windows update related services.
net stop bits
net stop wuauserv
net stop appidvsvc
net stop cryptsvc
Then rename the existing update folder to force windows update to recreate the update folder and restart the downloads.
ren %systemroot%\SoftwareDistribution BuggySoftwareDistribution
ren %systemroot%\system32\catroot2 Buggycatroot2
Finally restart the stopped services.
net start bits
net start wuauserv
net start appidsvc
net start cryptsvc
Hopefully windows update is now working fine.