0x80070424

This error 0x80070424 means "ERROR SERVICE DOES NOT EXIST". That is, BITS services does not exists in some way.

Usually it is enough to do this: Start > Run and type in

regsvr32.exe wuaueng.dll

and hit ENTER key. If this does not solve the issue:

Start > Run and type in this lines. Hit ENTER key after each one:

net stop wuauserv

regsvr32.exe wuapi.dll

regsvr32.exe wups.dll

regsvr32.exe wuaueng.dll

regsvr32.exe wucltui.dll

regsvr32.exe MSXML3.dll

regsvr32.exe qmgr.dll

regsvr32.exe qmgrprxy.dll

net start wuauserv


Reboot Windows and go to Windows Update.

FOOTNOTE: these dlls can be registered at a time by downloading and clicking twice on this file.