Fix Windows Update Error 0x80240fff in Windows 10/8/7

Microsoft Windows [Version 10.0.10586]
(c) 2015 Microsoft Corporation. All rights reserved.

C:\Windows\system32>net stop wuauserv
The Windows Update service is stopping.
The Windows Update service was stopped successfully.


C:\Windows\system32>net stop cryptSvc
The Cryptographic Services service is stopping..
The Cryptographic Services service was stopped successfully.


C:\Windows\system32>net stop bits
The Background Intelligent Transfer Service service is stopping..
The Background Intelligent Transfer Service service was stopped successfully.


C:\Windows\system32>net stop msiserver
The Windows Installer service is not started.

More help is available by typing NET HELPMSG 3521.


C:\Windows\system32>net stop AppIDSvc
The Application Identity service is not started.

More help is available by typing NET HELPMSG 3521.


C:\Windows\system32>Ren C:\Windows\SoftwareDistribution SoftwareDistribution.old

C:\Windows\system32>Ren C:\Windows\System32\catroot2 catroot2.old

C:\Windows\system32>net start wuaserv
The service name is invalid.

More help is available by typing NET HELPMSG 2185.


C:\Windows\system32>net start wuauserv
The Windows Update service is starting.
The Windows Update service was started successfully.


C:\Windows\system32>net start cryptSvc
The Cryptographic Services service is starting.
The Cryptographic Services service was started successfully.


C:\Windows\system32>net start bits
The Background Intelligent Transfer Service service is starting.
The Background Intelligent Transfer Service service was started successfully.


C:\Windows\system32>net start msiserver
The Windows Installer service is starting.
The Windows Installer service was started successfully.


C:\Windows\system32>net start AppIDSvc
The Application Identity service is starting........
The Application Identity service could not be started.

More help is available by typing NET HELPMSG 3523.


C:\Windows\system32>click exit and enter

now open and type powershell and run as administrators

Windows PowerShell
Copyright (C) 2015 Microsoft Corporation.

PS C:\Windows\system32> wuauclt.exe /updatenow
PS C:\Windows\system32> exit

and then restart.