PC is not accessible. You might not have permission to use this network resource. Contact the administratior of this server to find out if you have access permissions.

I have 3 computers on the network all running windows 7 ultimate. Only 2 of the computers are able to access all 3 computers and share files, but on the 3rd computer I am unable to access either of the other 2 computers.

I am able to ping my router and all of the computers from all of the computers.

I have the same workgroup on all of the computers.

I have tried turning the 3rd party and windows firewall off on all of the computers

I have made sure I am on the same subnet and gateway on all of the computers.

none of the netbios names conflict

file sharing is enable on all of the network adapters

share permissions are set to everyone with full control

and I have set my local security for networks to "Do not allow anonymous enumeration of SAM accounts and shares disabled andDo not allow anonymous enumeration of SAM accounts enable"

So I am at my wits end as to what I would try. Oh yes, all three computers where working perfectly once I am not sure what happened, I mainly just use the computer for video and haven't changed anything on it, perhaps an windows update could have done something but I am not sure.



Quote: "share permissions are set to everyone with full contro".

If you man that you used the Everyone use?


Everyone does Not mean Everyone that wants to logon.

If accounts are set only for John, Jill, and Jack, using the Everyone setting in the Folder Permissions saves the effort of setting Permission separately for John, Jill, and Jack.

Everyone else is Not in the Everyone group, only John, Jill, and Jack.

Thus, you have first to configure similar specific users on both computers and set then if you want you can set their permissions/security through Everyone.


Permission and Security issues, check the following settings.

Point to the a Folder that meant to  to be share. Right click and choose properties.

In the properties

Click on the Security tab shown in the pic bellow to the right) and check that the users and their permission (shown in the pic bellow center and left) are correctly configured. Then do the same to the Permission tab.

This screen shot is from Win 7, Vista's menus are similar.


In both the Security panel, and the Permission panel you have to highlight each User/Group and examine that the Permission Controls are checked correctly.

When everything is OK, Reboot the Network (Router, and computer).

* Note . The Groups and Users shown in the screen-shoot are just an example. Your list will look the way your system is configured.

**Note . You have to establish specific users. Everyone means all of the users that already have an account and been established as users. It does not mean Everyone that feel that they would like to login.


New Computers usually come with 3rd party security suits,that sometimes contribute to the Sharing issues.

Make sure that the Software Firewall on each computer allows free local traffic. If you use 3rd party Firewall On, Vista/XP Native Firewall should be Off, and the active Firewall has to adjusted to your Network IP numbers on what is some time called the Trusted Zone (consult your 3rd Party Firewall instructions

General example,  http://www.ezlan.net/faq#trusted

Please Note that some 3rd party Software Firewalls keep blocking aspects of Local Traffic even it they are turned Off (disabled). If possible configure the Firewall correctly, or totally uninstall it to allow clean flow of local network traffic. If the 3rd party software is uninstalled or disables, make sure that Windows native Firewall is On .


Jack-MVP Windows Networking. WWW.EZLAN.NET
Jack MVP, Microsoft Windows Desktop Experience-Networking.


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Last updated December 19, 2019 Views 44,218 Applies to: