Suspicious incoming connections blocked

Hello,
Do you play video games?

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bazfile
Moderator/Security Contributor.
A hello, a response, a thank you are always appreciated.

Hello

It's not my main use but yes from time to time. But I don't see the connection?

Since you have reinstalled Windows, it can no longer be an infection, which is why I think of a DDoS attack. This often happens when playing video games, but not only, hence my question. For your information, the IP you gave in your first message is German.

bazfile
Moderator/Security Contributor.
A hello, a response, and a thank you are always appreciated.

The problem is that it’s becoming really crippling with remote work.
However, I noticed some suspicious connections blocked by McAfee with an IP identical to that of my modem.
I’ve tried everything and I don’t know what to do anymore. Could this be coming from Orange? Or from McAfee?

Summary I prepared for the Orange support agents who are incompetent and unavailable...

About a week ago, suspicious incoming network connections were blocked by McAfee antivirus. They exceeded 3000 attempts. I then proceeded to completely reset my Asus laptop to check if it was a virus. It didn't change anything. I also changed my local IP, which had no effect either. In the meantime, I noticed that all the Windows devices in the household are affected. Since the reset last Saturday, I've been exceeding 3000 blocked connections on my device. I also tried resetting the Livebox to change its IP. I started using a VPN to avoid attacks, but nothing works. Additionally, I noticed that among foreign IPs (German, for example, or IPs like this one: :fe80::924d:4aff:fea8:b250 or even 162.159.129.235), there are source IPs from the Orange modem (192.168.1.1 or 192.168.1.52). There can be up to 4 connections blocked in 1 second, which takes up most of the bandwidth and no longer allows us to work remotely under good conditions. I am supposed to work on Zoom, but I find myself connecting via my phone's hotspot to keep up, if not having to follow on my smartphone, which is unacceptable during confinement. I've tried everything.

Note that the local addresses of the box like 192.168.1.xx (any number you want) correspond only to devices in our property. So no intrusion.

Moreover, when starting the PC, I have 15 to 20 minutes without major connection issues. It's as if there is a buildup and after a while it crashes.

Thank you.

As long as the connection sharing with your smartphone works and all your devices connected to the Livebox are affected, it must be a DDoS attack as I mentioned in one of my previous messages.
Since no one is responding to you in the network forum to get an overview of the PC, please do the following:

Download FRST once downloaded save it on the desktop then open it you will get this:

Click on Analyze at the end of the analysis you will have three text files on the desktop FRST, Addition and Shortcut, be careful to wait for the messages saying that the analysis is complete to appear, then send these reports to https://pjjoint.malekal.com/ see this tutorial paragraph Send analysis reports to pjjoint then provide the two links generated by Pjoint in your next message.

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bazfile
Moderator/Security Contributor.
A hello, a response, a thank you are always appreciated.