My two MS Windows personal computers have been cut off from the LAN network, because admin found faulty network connections from these PCs, in the cryptic form:

Date first seen Proto Src IP Addr:Port Dst IP Addr:Port Packets Bytes
2024-09-20 16:00:08.234 TCP 159.93.130.197:49342 -> 154.213.187.153:443 153 1038

I did thorough checking of PCs using free Windows Defender, but found nothing.

I need to find out what program(s) under MS Windows is(are) causing such faulty network packets, propmpting network admin to block the entire LAN connection.

Any help is appreciated. I am digging through network analysers in Microsoft Store, hoping to get something reasonable.