Windows Vista cannot obtain an IP address
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Problem:
- Windows Vista fails to connect to wired or wireless network. Notice that the network connection icon keeps on rotating and ends to limited connectivity
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To manualy resolve this issue yourself, disable the DHCP BROADCAST flag in Windows Vista.
To do this, follow these steps:
- Click StartStart
 button, type regedit in the Start Search box, and then click regedit in the Programs list.
- (User Account Control permission If you are prompted for an administrator password or for confirmation, type your password, or click Continue.)
- Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID}
In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
- On the Edit menu, point to New, and then click DWORD (32-bit) Value.
- In the New Value #1 box, type DhcpConnDisableBcastFlagToggle, and then press ENTER.
- Right-click DhcpConnDisableBcastFlagToggle, and then click Modify.
- In the Value data box, type 1, and then click OK.
- Close Registry Editor.
This issue does not apply to Windows 7 because the registry key DhcpConnEnableBcastFlagToggle is set to 1 by default.
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Network Issues