You can upload the file to VirusTotal to have it analyzed by dozens of different antivirus engines simultaneously.
The software Virtual Audio Cable uses the .vac extension for some of its configuration or driver-related components. If you have audio routing software installed, this file may be a legitimate part of that toolkit. 1595406539.vac
Because the filename is non-standard, it is important to verify its safety: You can upload the file to VirusTotal to
Use Microsoft Defender or Malwarebytes to perform a "Custom Scan" on the specific folder containing the file to ensure it isn't malicious. Because the filename is non-standard, it is important
If it is in a temporary folder (like C:\Users\[User]\AppData\Local\Temp ), it is likely a leftover from a past installation or scan. If it is in C:\Windows\System32 and you did not put it there, use caution.
Many programs generate files named with a string of numbers (often a Unix timestamp) to ensure uniqueness. The number 1595406539 translates to Wednesday, July 22, 2020 , suggesting this file may have been created or timestamped on that specific date. Security and Maintenance
, or did it appear after installing a specific game or audio tool ? How to Run a Full Scan Using Windows Security