NIS won't run?

I've suddenly been having computer problems the past several days and have suspected a possible virus. I attempt to run NIS, and receive the following:

 

"C:\Program Files (x86)\Norton Internet Security\Norton Internet Security\Engine64\19.5.0.145\uiStub.exe

 

Unspecified error"

 

Yesterday I uninstalled and re-installed Norton and it ran fine for a day or so. Tonight I've used the Eraser, the recovery features and whatnot... I've actually lost track of everything I've tried.

 

I'm at a loss at what to do here, and any help would be greatly appreciated.