Missing manifests - error 80070490

SFC is now also happy
With any luck...
Do a check for Updates, and attempt to install ONLY the oldest update found.
If it goes in OK, try the rest.
If it fails, post the C:\Windows\windowsupdate.log file.

There's a few odd entries in the wu log...

Code:

2015-07-16	10:24:31:792	 636	11c4	Report	***********  Report: Initializing static reporting data  ***********
2015-07-16	10:24:31:792	 636	11c4	Report	  * OS Version = 6.1.7601.1.0.66304
2015-07-16	10:24:31:792	 636	11c4	Report	  * OS Product Type = 0x00000003
2015-07-16	10:24:31:792	 636	11c4	Report	WARNING: Failed to load reporting information from Win32_ComputerSystem with hr = 80041010.
2015-07-16	10:24:31:792	 636	11c4	Report	WARNING: Failed to load reporting information from Win32_BiosProperties with hr = 80041010.
2015-07-16	10:24:31:792	 636	11c4	Report	  * Locale ID = 2057
2015-07-16	10:24:32:057	 636	b2c	DnldMgr	Download manager restoring 0 downloads

I suspect that this arises from a corrupt WMI repository.

Open an Elevated Command Prompt
type the following command

net stop winmgmt
(hit the Y key and enter, to respond to the confirmation - repeat the command if you get an error)
now you can copy and paste the rest -

sc config winmgmt start= disabled
cd %windir%\system32\wbem
for /f %s in ('dir /b *.dll') do regsvr32 /s %s
for /f %s in ('dir /b *.mof') do mofcomp %s
wmiprvse /regserver
sc config winmgmt start= auto

WAIT for it to finish - it could be a couple of minutes

Now reboot.

Try windows update again, and post the new windowsupdate.log file