update failed code 643 unknown error

Several updates failed, namedly Microsoft.NET Framework 4 client Profile for windows 7 x64-based systems and Security Update for 2007 Office.  I have also been unable to update to the most recent version of itunes so I set my windows installer to manual start but I recieve the message The Microsoft Installer Service could not be accessed. This can occur if you are running Windows in safe mode, or if the Windows Installer is not correctly installed.Please help, I cannot use my new Iphone 4 fully.

 

Question Info


Last updated March 25, 2018 Views 1,155 Applies to:
Answer

Have you tried installing those two Microsoft Updates manually? http://www.microsoft.com/downloads

To reinstall the Windows Installer, rename the damaged Windows Installer files, and then reinstall the Windows Installer. To do this, follow these steps:

   1. Click Start, click Run, type cmd in the Open text box, and then click OK.
   2. Type cd %windir%\system32, and then press ENTER.
   3. Type attrib -r -s -h dllcache, and then press ENTER.
   4. Type ren msi.dll msi.old, and then press ENTER.
   5. Type ren msiexec.exe msiexec.old, and then press ENTER.
   6. Type ren msihnd.dll msihnd.old, and then press ENTER.
   7. Type exit, and then press ENTER.
   8. At the command prompt, type exit, and then press ENTER.
   9. Click Start, and then click Turn off computer or Shut Down.
  10. Select the Restart option, and then click OK, or click Restart.
  11. Log on to the computer.

    1. Click Start, and then click Turn off computer or Shut Down.
   2. Select the Restart option, and then click OK, or click Restart.

Also:

Click Start
Type: CMD, from the results, right click CMD
Click 'Run as Administrator'
At the Command Prompt, type: sfc/scannow

This will check for any integrity violations

Restart your system


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