Turn off auto updates.
you can run this to do it for you > http://go.microsoft.com/?linkid=9709472
or do it yourself manually
restart the computer.
go to the folder,
C > Windows > SoftwareDistribution > Download
You need to delete everything in the Download folder.
But DO NOT delete the folder it'self,
then navigate to,
C > Windows > SoftwareDistribution > DataStore.
delete everything in the DataStore folder BUT DO NOT DELETE THE LOGS FOLDER.
open the Logs folder and delete everything in there.
Now close all open windows,
Run this Fix > http://go.microsoft.com/?linkid=9665683
Note this Fix it Solution has two modes Default and Aggressive.
You should run the Fix it solution in Default mode .
Now restart the computer.
turn windows updates back on.
you can run this to do it for you > http://go.microsoft.com/?linkid=9709473
or do it yourself manually
manually check for updates.
still failing ?
repeat the above but this time run the fix in Aggressive mode.
still failing ?
run an anti malware and anti virus scan,
http://www.malwarebytes.org/
http://www.eset.com/us/online-scanner-popup/
if infections are found,
remove them
then repeat the above.
still failing ?
run the system file checker.
then repeat the above
( How To > http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html )
still failing ?
stop sodding about with it and
re-install the operating system.
.