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:
- Click on Start
- Select Run
- In the "Open:" field, type cmd
- 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:
- Type msiexec /unregister and press Enter
- 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.