Q: HELP! Unknown device on network map This thread is locked from future replies

netbook running win7 starter over a wireless network.  full network map shows a big "?" between netbook and wireless router.  this is not seen by any other network computers which are running either vista or xp.  netbook can access the other computers but netbook is not accessible to other computers.  error message says to check spelling of computer name.  workgroup is set up and the same for all.  no homegroups setup.  very concerned about the unknown device.




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The question mark between your gateway (router) and your netbook indicates that your computer doesn't know its default gateway to connect to internet. Once the computer knows its gateway, with the help of routing tables the rotuer will be able to route your computer to outside its LAN. Below are some the steps that you might have to try to resolve your issue.

Method 1:

Let’s try to uninstall and re-install the most updated drivers for your network adapter. To do that click on start, in the instant search window type in devmgmt.msc. This should bring up the device manager. Right click on the network adapter listed below click on uninstall. Now go to your computer manufacturer’s website and download the latest drivers for your network adapter and install them.

Method 2:

Try to reset Transmission Control Protocol / Internet Protocol (TCP/IP).
The reset command is available in the IP context of the NetShell utility. Follow these steps to use the reset command to reset TCP/IP manually:
1. To open a command prompt, click Start and then click Run. Copy and paste (or type) the following command in the Open box and then press ENTER: cmd
2. At the command prompt, copy and paste (or type) the following command and then press ENTER:
netsh int ip reset c:\resetlog.txt
Note If you do not want to specify a directory path for the log file, use the following command:
netsh int ip reset resetlog.txt
3. Reboot the computer.

Method 3:

1. Click Start, type regedit in the Start Search box, and then click regedit in the Programs list.
If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
2. Locate and then click the following registry subkey:
3. In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
4. On the Edit menu, point to New, and then click DWORD (32-bit) Value.
5. In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.
6. Right-click DhcpConnEnableBcastFlagToggle, and then click Modify.
7. In the Value data box, type 1, and then click OK.
8. Close Registry Editor.
By setting this registry key to 1, Windows Vista will first try to obtain an IP address by using the BROADCAST flag in DHCP Discover packets. If that fails, it will try to obtain an IP address without using the BROADCAST flag in DHCP Discover packets.

Method 4:

Using the Network troubleshooter in Windows 7
Let us know if this helps


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Views: 9,179 Last updated: March 13, 2018 Applies to: