Solution: The Windows Installer Service Could Not Be Accessed Error In Windows

When you try to install a program which uses the built in Windows Installer service, it gives the following error:

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.

This issue may occur in Windows XP or in Windows Vista. The reason behind this error is that sometimes the Windows Installer service gets corrupt due to registry corruptions etc. or simple enough the Windows Installer service is not running at all. There are two fixes that I have found useful for this problem.

Through Run Command:

This is the Microsoft solution which comes in handy because of its ease of use:

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

Through Registry:

This is also a simple trick. Just download the following registry file and double click it. It will ask if you want the information to be added to the registry, just press yes. Now you should be able to install your programs without any problems. If still there’s a problem, restart your system once.

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