Hello MDBoy,
From a search on the internet, Western Digital Data LifeGuard Diagnostics is a software that performs hard disk diagnostics.
The utility can perform drive identification, diagnostics, and repairs on a Western Digital FireWire, EIDE, or USB drive. In addition, it can provide you with the drive's serial and model numbers.
In addition, there is a feature called **Write Zeros:**This option can be used to erase operating systems and file systems.
So if you didn't install this software, I would suggest you uninstall and remove this diagnostic software. You can go to Control Panel, click on Programs and Features. The Western Digital Data LifeGuard Diagnostics should be listed there. There is a column there for Installed on. This will give you the date the software was installed so it may give you a clue.
Thanks,
Marilyn