What Does The Vigua.a Detection Identifier Do?
Vigua.a is the string used by Windows Defender to identify a potentially malicious, unwanted or problematic file.
As with many detections that may trigger on your system, the Vigua.a is a generic type of detection. The full string and handle used by Windows Defender for this detection is PUA:Win32/Vigua.A.
The security software identifies the potential threat as a PUP or a potentially unwanted program. Potentially unwanted programs are a category of apps that is neither here nor there - somewhere between full-on malware and legitimate apps.
Regardless, as the name implies, this sort of application is "potentially unwanted" and it is usually a wise move to go with the Windows Defender detection and block or remove the application in question, just to be on the safe side, even if it was a false positive.