How to fix a machine that is not getting updates from the wsus

1.Delete SusClientId and SusClientIdValidation from this path
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate

2.run gpupdate /force and make sure that the WSUS URL is listed here
HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate /v WUStatusServer /t REG_SZ /d http:// SERVERNAME HERE /F

3.Open the Command Prompt as an Admin and execute the following

net stop wuauserv /y
net stop BITS /y

rd C:\WINDOWS\SoftwareDistribution /s /Q
del "c:\windows\windowsupdate.log"

regsvr32 WUAPI.DLL /s
regsvr32 WUAUENG.DLL /s
regsvr32 WUAUENG1.DLL /s
regsvr32 ATL.DLL /s
regsvr32 WUCLTUI.DLL /s
regsvr32 WUPS.DLL /s
regsvr32 WUPS2.DLL /s
regsvr32 WUWEB.DLL /s
regsvr32 msxml3.dll /s

net start wuauserv /y

wuauclt.exe /resetauthorization /detectnow

4.Check for update