Unable to open connection to MS Access 2013 .accdb file Under WCF Web Service Project Using Windows 8.1 64bit

I am encountering the following error when trying to connect to an Access 2013 database:
The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.
I have Visual Studio 2013 SP3 running on Windows 8.1 64bit OS which also has Office 2013 installed (which includes MS Access 2013). My project is a WCF web service using .NET Framework 4.5.1 using any cpu as target. I have tried reluctantly
to install the older drivers as described by in the below article:
https://social.msdn.microsoft.com/Forums/en-US/1d5c04c7-157f-4955-a14b-41d912d50a64/how-to-fix-error-the-microsoftaceoledb120-provider-is-not-registered-on-the-local-machine?forum=vstsdb
and also went through the "Add Data Source" wizard in the Project menu to have the connect string automatically built. Even with the automatically built connect string I can not connect to the .accdb file from within my WCF web service.
What's odd is if I use the Database Explorer in Visual Studio it has no problem connecting the my Access file. I inspected the connect string and tried to use it as well but still get the same error. Even stranger is that I have no problem connecting
to the Access DB in an ASP.NET project on the same PC. I am also able to connect to the Access file using a simple Windows Forms application. So I'm wondering if it has something to do with trying to connect to the Access file from a WCF web service
project.
What I'd like to know is if anyone has been able to get this to work in an environment as I described above as a 64bit WCF web service project? I tried to switch my project to 32bit but when I do I get a different error which reads:
System.BadImageFormatException: Could not load file or assembly 'file:
Almost to the point of trying to get this web service project done with SQL Express but would like to know if it can be done with MS Access 2013. Any information anyone can provide to help me get past this issue is greatly appreciated. Thanks.

Have you installed the 64-bit Access driver on your machine? See
Data Source Names and 64-Bit Operating Systems for the differences in odbcad32. Call %SystemRoot%\system32\odbcad32.exe to check the drivers.
How do you host your service? Stand-alone or IIS or embedded to another application? Keep in mind that IIS7 runs it in its application pool which is defaullt 64bit. Thus the bad image exception, when compiling your service as 32bit.
When you need the Access database for your service to store informtation, then I would switch to SQL Server (Express) or XML files depending on your actual needs.
Also check whether your account under which your service is run has the necessary NTFS file permissions on the access file and the folder. This is getting even more complex when it's a remote folder.

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From: IsiSviluppo <[email protected]>
Reply-To: "[email protected]"
<[email protected]>
Date: Wed, 07 Apr 2010 00:07:20 -0600
To: Carl Tung <[email protected]>
Subject: Small Business Network Storage New message: "Concurrent users
unable to open a shared Microsoft Access MDB database" YbIMb-16E-b7l
catung,
A new message was posted in the thread "Concurrent users unable to open a
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Author : IsiSviluppo
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