I'm currently using a window 7 64 bit operating system fujitsu laptop and I've been trying to install a update: 'Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2160841)'. However, upon many tries of installing the update, i still couldn't get it install. The error details for the update is Code 66A.
Therefore, after searching on Windows forum for solution for that error, i've tried to repair the Microsoft .Net Framework 4 Client Profile by following these steps:
A.Click on Start and click on Control panel.
B.Go to Program and Features.
C.Scroll down to Microsoft.Net Framework 4 Client Profile, right click it.
D.It will give you a choice of Uninstall/Change, click it.
E.Then, it will give a choice to repair.
After following the above steps, the repair did not succeed because: Generic trust failure.
Part of the log:
Action: Downloading and/or Verifying Items...
[4/7/2011, 15:1:20]File C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\Windows6.1-KB958488-v6001-x64.msu, locked for install.
[4/7/2011, 15:1:20]Verifying Digital Signatures: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\Windows6.1-KB958488-v6001-x64.msu Success
[4/7/2011, 15:1:20]Verifying Digital Signatures: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\SetupUtility.exe
[4/7/2011, 15:1:20]File lock postponed for C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\SetupUtility.exe.
[4/7/2011, 15:1:20]Verifying Digital Signatures: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\SetupUtility.exe Success
[4/7/2011, 15:1:20]Verifying Digital Signatures: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\netfx_Core.mzz
[4/7/2011, 15:1:20]Possible transient lock. WinVerifyTrust failed with error: 2148204800
[4/7/2011, 15:1:20]C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\netfx_Core.mzz - Signature verification for file netfx_Core.mzz (C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\netfx_Core.mzz) failed with error 0x800b0100 (No signature was present in the subject.)
[4/7/2011, 15:1:20]File netfx_Core.mzz (C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Client\netfx_Core.mzz), failed authentication. (Error = -2146762496). It is recommended that you delete this file and retry setup again.
[4/7/2011, 15:1:20]Failed to verify and authenticate the file -C:\Windows\Microsoft.NET\Framework64\v4.0...\netfx_Core.mzz
[4/7/2011, 15:1:20]Please delete the file, C:\Windows\Microsoft.NET\Framework64\v4.0...\netfx_Core.mzz and run the package again
[4/7/2011, 15:1:20]calling PerformAction on a repairing performer
[4/7/2011, 15:1:21]Final Result: Installation failed with error code: (0x800B010B), "Generic trust failure. " (Elapsed time: 0 00:00:03).
[4/7/2011, 15:1:24]WM_ACTIVATEAPP: Focus stealer's windows WAS visible, NOT taking back focus