can't connect to the homegroup

Hello!
At home we have 4 PCs, I used to share file using homegroups without any issues.
just three days ago, I had to reinstall the windows on an HP Mini, and after that it couldn't connect to the homegroup, instead it says Create a homegroup.
I have tried:
-to clean the files in Peernetworking... from all computer, then turned the main one and after that creating a homegroup turning the others, they all detected the homegroup to join, except one.
-I have also ran the troubleshooter.
-I made sure that it's connected to a private not public network.

thanks in advance.

after disabling Windows Defender, I'm now able to join the homegroup, but the one of my computer can't be seen on the homegroup, but can't be seen in the Network.

Have you got ipv6 running as its needed by homegroups also check NetBIOS is running

thanks for your reply.

yes, they are both running

Between the two connected laptops to the homegroup and the one that has the issue, there are two differences as listed in the two pictures below, the absence of the following:

I updated the Wifi driver and added DisabledComponenont + EnableICSIPv6 to the registry.

but I still can't connect to the homegroup