Windows 10: Laptop unable to see/access other computers on network

I recently upgraded my upstairs desktop (formerly Windows 7) and my laptop (formerly Windows 8.1) to Windows 10. Since then I have spent hours and hours trying to get them visible to each other on my home private network (no homeGroup).

I have a total of 3 computers on my network, upstairs desktop (W 10), downstairs desktop (W XP Home) and laptop (W 10). I have now been successful in getting the two desktops to see each other and share files and printing. My laptop on the other hand has been a different story.

1. The laptop sees the upstairs desktop computer but not the downstairs desktop computer. When I try to access files on the upstairs desktop I get an error and run the troubleshooter and it comes up with "One or more network protocols are missing on this computer" "Windows Sockets registry entries for network connectivity are missing". I can get to the internet on the laptop with no problem.

2. If I turn the upstairs desktop and laptop off, boot up the laptop FIRST and then the upstairs desktop, everything works fine, but as soon as I turn the laptop off and restart I get the same issues of not seeing the downstairs desktop and file accessing of the upstairs desktop becomes an issue.

Any ideas or help would be appreciated!

:)

 

laptop will not see the other computer on the network

The same situation with different HW (laptop Sony VAIO)

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The other computers see the laptop, I can work on it.

I can ping from laptop to the other computers using the computer name,

with response time 2 -5 ms. So communication from laptop to the router is OK.

 

laptop will not see the other computer on the network

Hp desktop and hp laptop. Both connected through the same router, the desktop via CAT 6 and the laptop via WIFI.. My desktop sees the laptop and I can log into it and use whatever files I need, however the laptop cannot recognize the desktop. It sees all
network media devices, several of which are on the desktop, so I know that it is connected to the correct network. It even sees the ROKU that is connected to the same router. The only thing that it will not see is the desktop. I have several computers on the
network, and they all communicate through the network just fine with this one exception. File and printer sharing is on for both computers and I have tried several other "fixes" to no avail. Any help is greatly appreciated. I have uninstalled the virus protection
software, turned off windows defender and the firewall. I am lost as to what else could be the problem. I set up a home group, and the laptop joined it no problem, but it still couldn't see the desktop.

Thanks in advance,

Joe