check this out... hope it can solve your problem
I followed these steps with slight modifications. I will outline these here:
0. Performed a clean boot (http://support.microsoft.com/kb/929135/en-us), making sure that avast was disabled. Avast has a self-defense mechanism, that can prevent
you from terminating the service. You need to disable that. Otherwise it will still run even with a clean boot
1. Verified that Windows Update KB2919442 is installed by examining Control Panel\System and Security\Windows Update\View update history
2. Downloaded the Windows 8.1 Update for x64-based Systems (KB2919355, published 4/16/2014) (http://www.microsoft.com/en-us/download/details.aspx?id=42335),
including all six files:
Windows8.1-KB2919355-x64.msu
Windows8.1-KB2932046-x64.msu
Windows8.1-KB2934018-x64.msu
Windows8.1-KB2937592-x64.msu
Windows8.1-KB2938439-x64.msu
Windows8.1-KB2959977-x64.msu
3. Tried to create an empty System Tools folder to C:\ProgramData\Microsoft\Windows\Start Menu\Programs, but was unable to. After creating it, it immediately disappears. Didn't bother to investigate further.
4. Ran the following command with administrative privileges:
dism /online /remove-package/packagename:Package_for_KB2919355~31bf3856ad364e35~amd64~~6.3.1.14
5. Rebooted my PC
6) Ran the following two commands with administrative privileges:
dism /Online /Cleanup-image /Restorehealth
dism /online /cleanup-image /startcomponentcleanup
For the first time in about 20 tries, the restorehealth portion tells me that corruptions are
fixed!
7) Ran the Microsoft Fixit tool for Windows Update (http://support.microsoft.com/kb/971058). It found some issues that it fixed as well
8) rebooted again
9) Manually installed KB2919355 with success (starting the process from a command line as an administrator) and rebooted when prompted.
10) I attempted to run the other updates in the same fashion, rebooting when asked to do so.
KB2932046 succeeded
KB2959977 succeeded as well
KB2937592 no luck with this one. I get the error that the path could not be found. So instead of manually trying to update, I decided to use Windows update. It reported that there are 3 more updates to be installed and prompted for a reboot. That succeeded
as well.
Last Step: Turned off clean boot by following the instructions above (http://support.microsoft.com/kb/929135/en-us). Remember to enable Avast's self defense.
Done. Thanks to everyone who contributed to this thread and helped gather solutions from elsewhere.
all the information above are taken from the thread below
==========================================================================
http://answers.microsoft.com/en-us/windows/forum/windows8_1-update/windows-81-update-fails-to-install-kb2919355/2831c218-68a0-4ca0-99c1-b8193b5b8f33?page=5
