why error - \\computer is not accessible.You might not have permission to use this network resource.contact the administrator ?

Method 1: Enable NetBIOS over TCP/IP and start the Computer Browser serviceTo resolve this issue, make sure that NetBIOS over TCP/IP is turned on and that the Computer Browser service is running on each computer in the workgroup. To do this, follow these steps.
Step 1: Enable NetBIOS over TCP/IP
1. Click Start, click Control Panel, and then click Network and Internet Connections.
2. Click Network Connections.
3. Right-click Local Area Connection, and then click Properties.
4. Click Internet Protocol (TCP/IP), and then click Properties.
5. Click the General tab, and then click Advanced.
6. Click the WINS tab.
7. Under NetBIOS setting, click Enable NetBIOS over TCP/IP, and then click OK two times.
8. Click Close to close the Local Area Connection Properties dialog box.
9. Close the Network Connections window.


Step 2: Start the Computer Browser service

1. Click Start, right-click My Computer, and then click Manage.
2. Double-click Services and Applications.
3. Double-click Services.
4. On the right side, right-click Computer Browser, and then click Start.
5. Close the Computer Management window.

Method 2: Install File and Print Sharing and make sure that it is not blocked by Windows Firewall
Step 1: Install File and Print Sharing for Microsoft Networks
1. Click Start, click Run, type ncpa.cpl, and then click OK.
2. Right-click Local Area Connection, and then click Properties.
3. Click the General tab, and then click Install.
4. Click Service, and then click Add.
5. In the Network Service list, click File and Print Sharing for Microsoft Networks, and then click OK.
6. Click Close.

Step 2: Make sure that File and Printer Sharing is not blocked by Windows Firewall
1. Click Start, click Run, type firewall.cpl, and then click OK.
2. On the General tab, make sure that the Don't allow exceptions check box is not selected.
3. Click the Exceptions tab.
4. On the Exceptions tab, make sure that the File and Printer Sharing check box is selected, and then click OK.

Make sure all computers in the workgroup are configured to use NetBIOS over TCP/IP. Follow these steps:

1. On the desktop, right-click My Network Places, and then click Properties.
2. Right-click the appropriate connection, and then click Properties.
3. Click Internet Protocol (TCP/IP) and click Properties.
4. Click Advanced, and then click WINS.
5. If you are using a static Internet Protocol (IP) address, click Enable NetBIOS over TCP/IP. If you have a DHCP-assigned IP address, click Use NetBIOS setting from the DHCP server.
6. Click OK in the open dialog boxes to close them and to save the new settings.

If this procedure does not resolve the difficulty, force a browser election by restarting all computers in the workgroup.

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.To resolve this issue, set the value of the restrictanonymous registry entry to 0. To do this, follow these

steps:1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then double-click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
3. In the right pane, double-click restrictanonymous.
4. Make sure that the value in the Value data box is set to 0, and then click OK.
5. Close Registry Editor.
6. Restart the computer.