Eset-upd

Once the update cycle finishes, these processes terminate automatically. If they remain open for hours, run the ESET System Diagnostic tool (ESET SysInspector) to check for handle leaks.

If you find eset-upd.exe running from C:\Users\YourName\AppData\ , C:\Windows\Temp\ , or a USB drive, That is a classic malware impersonation tactic.

Yes. If you see this process running in your Task Manager or logs, it is a legitimate and essential part of your security software.