dit lijkt het mij te zijn 
is wel in het engels 
Van Microsoft zelf afkomstig:
The issue is that the WUA 3.0 (7.0.6000.374) upgrade is corrupted, 
essentially the system reports the WUA to be 7.0.6000.374 but the files 
on the disk are still from the old version (you can check some of the 
DLLs like wups.dll, wuaueng.dll etc... in the windows\system32) ... and 
you cannot install the WUA 3.0 even manually. 
delete the following file: 
C:\windows\winsxs\pending.xml 
Since Windows security will not allow you to do this, hereunder the 
procedure to take ownership of the file: 
run a command prompt with "Run as Administrator". 
Type in the following commands: 
takeown /f C:\Windows\winsxs\pending.xml 
cacls C:\Windows\winsxs\pending.xml /G <YourUsername>:F 
[ voor <Yourusername> moet je dus jouw accountnaam, waarschijnlijk 
remix999  typen; 
then delete the file 
Reboot the machine, then manually install the WUA 3.0 downloadable from 
here: 
http://download.windowsup...dowsUpdateAgent30-x86.exe 
This should fix the Error 80073712 when the other solutions do not work
succes