I had an employee who used the windows address book to store contacts. They had two computers, and I switched the hard drives, and changed the ide ...

WAB.exe file is the Windows Address Book. It is used to store contact details, e-mail addresses, etc. It it consumes high CPU or resources, see this post..

How to Transfer a PC Address Book to a Mac. The Address Book on your Windows-based computer stores the contact information for your business and personal contacts all in one location.