Windows XP do not haver permission to access Windows 7

I have three computers on the network with a wireless router.

Computer 1: Windows 7 - Wired
Computer 2: Windows 7 - wireless
Computer 3: Windows XP - wireless
Virtual computer: Windows XP running on computer 1

Everything worked perfectly well until recently. Now 3 computer cannot access computer 1 and the following error message
"1 \\Computer is not accessible. You are not allowed to access the network resource. "Contact the administrator... etc.

No network changes have been made on all computers. All the computers are on the same workgroup and 3 computer can access the Working Group and display all computers, it can access 2 the computer and the virtual machine, it can also ping Computer1.

Computer 2, 1 of the computer and the virtual machine have no network problem, everyone can ping and access other computers on the network.

I checked the network and sharing settings on computer 1 and it took for granted the FULL CONTROL for EVERYONE. I tried the race using the home network again on 3 computers as well as Assistant to try an electrician. Nothing seems to work, please help.

Thank you for taking the time to answer.

I have not changed any user name and there is no set of passwords.

The strangest thing is the actions have suddenly started working again so I could not test your suggestion. I did not bring any changes so I have yet to find the root cause of the problem, and I get the sinking feeling that it used perhaps the last time this happens. I'll be sure to try your suggestion if it arise again

Tags: Windows

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