comman repair run &The Windows Installer Service Could not be Accessed

[Start] [Run] [Regedit]
Registry Key: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\ Policies\Explorer
Create a DWORD value for each Run function that will be disabled.

Modify/Create the Value Name [DisableLocalMachineRun] according to the Value Data listed below.
Data Type: REG_DWORD [Dword Value] // Value Name: DisableLocalMachineRun

Modify/Create the Value Name [DisableLocalMachineRunOnce] according to the Value Data listed below.
Data Type: REG_DWORD [Dword Value] // Value Name: DisableLocalMachineRunOnce

Modify/Create the Value Name [DisableCurrentUserRun] according to the Value Data listed below.
Data Type: REG_DWORD [Dword Value] // Value Name: DisableCurrentUserRun

Modify/Create the Value Name [DisableCurrentUserRunOnce] according to the Value Data listed below.
Data Type: REG_DWORD [Dword Value] // Value Name: DisableCurrentUserRunOnce

Setting for Value Data: [0 = Disabled / 1 = Enabled]
Exit Registry and Reboot




Windows XP - Error: The Windows Installer Service Could not be Accessed

This document provides a solution to the error message: "Windows Installer Service could not be accessed".

When attempting to install software on Windows XP the end-user receives a message that reads:

    "The Windows Installer Service could not be accessed. This can occur if you are running Windows in a safe mode, or if the Windows Installer is not correctly installed. Contact your support personnel for assistance."

To resolve the problem:

   1. Click on Start
   2. Select Run
   3. In the "Open:" field, type cmd
   4. Click OK

An MS-DOS Prompt window will come up on the screen with a blinking cursor at the command line. In this window you will need to do the following:

   1. Type msiexec /unregister and press Enter
   2. Type msiexec /regserver and press Enter

After you have run the second command, it will return you to a new line ending with > and a blinking cursor. When you see this, you may safely close the command prompt, and try installing the software again.