Kaspersky Security Service (vsserv.exe)
vsserv.exe is the real-time protection service associated with Kaspersky security products. It launches with Windows, coordinates the antivirus engine, file reputation checks, cloud lookups, and rule updates to keep defenses current. As a core background process, it enables continuous threat detection while the system runs normal user tasks.
Vsserv.exe operates as a Windows service started by Kaspersky's protection suite. It interfaces with the AV engine (avp) and cloud services to evaluate files and processes, applying signatures and behavior-based rules to block or quarantine threats.
Reasons it's running: