"The Windows Installer Service Could Not Be Accessed"

If you are getting the following message on a Windows XP machine:

The Windows 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. Contact your support personnel for assistance.

 To resolve this issue, follow these steps:

1. Log on to your computer as an administrator.
2. Click Start, and then click Run.
3. In the Open box, type cmd, and then click OK.
4. At the command prompt, type msiexec.exe /unregister, and then press ENTER.
5. Type msiexec /regserver, and then press ENTER.

If you are continuing to have problems, click on the Original Source Link below.

Original Source

http://support.microsoft.com/kb/315353