Windows Update Error 0x8024402C

I have a difficulty on updating my Windows 7 Ultimate SP1 through Windows Update!

• [updated] Windows Update ends up with different errors 80070008 or 8007000e , 80072EE2 , C80003F3, and 80244019.

• Windows Update Automated Troubleshooter reports (not fixed) :

  RootCause:
  RC_DataStore

  ErrorCode:
  0x8024402C

Other things that I have tried so far :

• Reboot (charger and battery removed)

• Updating system/windows date and time

• Checking Windows Update Options (Notify me when update available but do not download and install automatically)

• Windows Update is using the latest agent (Windows Update Agent 7.6.7600.320)

• System scanned for malware or virus – nothing found !

• Drive C got 109G and Drive D got 29G of free space !

• MY Windows copy is activated and genuine !

• [updated] Already signed up for Microsoft Update to get "Update for more products"

• [updated] I have checked Windows Update service in different times (seems no Windows server down)

• Internet connection is okay – connected through a Home network with no proxy (Direct Access) !

• I am using the system as the default Administrator !

• Microsoft Security Essentials is up-to-date and is the only antivirus software is currently runing on my system !

• [updated] System File Checker (sfc /scannow) found no missing or corrupted system files as Microsoft Support article kb/929833 suggested !

• I have recovered my system with my different systerm restore images to fix this but to no avail !

• [updated] Microsoft Fix it 50202 couldn't fix the problem !

• [updated] System Update Readiness tool (kb/947821) couldn't help too !

• After not getting result from above fixes, I reset Windows Update components manually as described by Microsoft Support – article kb/971058 – (even with aggressive mode – renaming SoftwareDistribution folder) but the problem still continues !

I really dont know what to do next ! Need your help …