What is it?

datalayer.exe is associated with Nokia PC suite application.

What does it do?

Nokia PC Suite 5 - "A collection of powerful tools that you can use to manage your phone features and data." Synchronize the phone with, for example Outlook. You can also use it to browse your phone, edit the phone list and so on.

More info:

found [http://startup.iamnotageek.com/srch-DataLayer.exe.html]here[/url].