Troubleshooting Local Network Connectivity Issues

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The issue involves a one-way communication problem between two computers on a local network, where Computer A can be pinged by Computer B, but not vice versa. Despite firewalls being ruled out as a factor, Computer B is unable to access shared folders on Computer A, receiving an error message indicating that the specified folder is not valid. This suggests potential issues with network settings, permissions, or configurations on Computer A that prevent it from responding to pings from Computer B and sharing its resources. To resolve this, users should check network configurations, ensure proper sharing settings are enabled, and verify that both computers are on the same subnet. Additionally, examining any security software or network isolation settings that may affect connectivity is advisable.
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Do you know why computer A can ping computer B but computer B can't ping computer A ? Firewalls on or off in this local cable sharing are not a problem. Just now that I can't do things like setting up [\\computerAName\ASharedFolder] from computer B's sharing widzard anymore. How can i fix this problem ? Thanks in advance
 
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That's honestly a very vague description for a very complicated system where a million things can go wrong. So you can access computer A (\\compA) from computer B, but not (\\compB) from computer A?
 
No, they can't look at each others shared folders, err message says "it doesn't appear to be a valid folder,pls specify another one", and B can ping A but A can't ping B.

What happens with both I don't understand/
 
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