Problem with the network connection Wireless since installation of win 7.

I ve just installed Windows 7 last week and no problems until yesterday when all of a sudden my laptop can´t to connect to my wireless network... Strange because my Iphone can't, so it seems like there is no problem with the network.
And the funny part is that when it detects one network different, other than mine, it connects and works very well!

I ve tried unplugging the laptop and Wi - Fi connection, but it just says that it can´t to connect to the network... He finds it, but when I click on connect it says only: No..

What to do?

Hi KlinzmannFussballspielerin,

Welcome to the Microsoft Answers community.

Before you try the procedure below, change the security settings for the firewall at various levels and check if the problem persists.

I suggest you to update the network drivers.

Steps to update of network driver:

1. click on the Start button.

2. in the search box type devmgmt.msc, and then press ENTER.

3. Select the network device and right click on it

4. now, select Properties.

5. in the Properties window, on the driver tab, click Update driver.

6. After installing the updates, restart the computer.

For more information visit http://windows.microsoft.com/en-US/windows-vista/Finding-drivers-What-to-do-when-your-hardware-wont-work-with-Windows-Vista

To solve your problem, try to turn on network discovery. To do this follow the steps below:

1. Open advanced sharing settings by clicking the Start button, then Control Panel. In the search box, type network, click Network and sharing Center, and then, in the navigation pane, click on change settings for sharing advanced.

2. click on the chevron to expand the current network profile.

3. click turn on network discovery and then click on save changes. If you are prompted for an administrator password or a confirmation, type the password or provide confirmation.

To learn more about this feature, please visit the below mentioned link:

http://Windows.Microsoft.com/en-us/Windows7/what-is-network-discovery

If the problem persists then I suggest you to reset the network adapter settings. Then follow the steps below

To reset the stack TCP/IP go to this article and either click on "Fix it for me" or follow the instructions to fix it yourself:

http://support.Microsoft.com/kb/299357

Disable the IP helpdesk:

1 hold the Windows key and type R, type "services.msc" (without the quotes) and press enter

2. scroll down to the IP assistance service, right-click on it and select Properties

3. in the drop-down list box that says "Automatic" or "Manual", set it to disabled and then click 'apply '.

4. then click on "Stop" to stop the service from running in the current session

5. click on OK to exit the dialog box

Disable IPv6:

Try to uninstall IPv6 on all interfaces, the removal of virtual cards of IPv6 and reset the TCP/IP stack. To remove the IPv6, go to the properties for each network adapter, and deselect the check box next to the Protocol "Internet Protocol version 6 (TCP/IPv6), which will turn off, or select it and click on uninstall, which withdraw power off the computer.» Then go into Device Manager and remove any 4to6 adapters, adapters miniport WUN or tunnel adapters.

NOTE: You should do this for each network connection.

Disable the DHCP broadcast flag: link: http://support.microsoft.com/default.aspx/kb/928233

Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems can occur if you modify the registry incorrectly. Therefore, make sure that you proceed with caution. For added protection, back up the registry before you edit it. Then you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click on the number below to view the article in the Microsoft Knowledge Base:

http://support.Microsoft.com/kb/322756

(How to back up and restore the registry in Windows)

Windows Vista cannot obtain an IP address from certain routers or some non-Microsoft DHCP servers

To resolve this issue, disable the DHCP BROADCAST flag in Windows Vista. To do this, follow these steps:

1. Click Start, type regedit in the search box, and then click regedit in the list programs.

If you are prompted for an administrator password or for confirmation, type your password, or click on continue.

2. Locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\ {GUID}

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 area #1, type DhcpConnEnableBcastFlagToggle and press ENTER.

6 right-click DhcpConnEnableBcastFlagToggle, then click on modify.

7. in the value data box, type 1 and then click OK.

8. close the registry editor.

By setting this registry key to 1, Windows Vista's trying to get an IP address using the BROADCAST flag in DHCP Discover packets. If that fails, he will try to obtain an IP address without using the BROADCAST flag in DHCP Discover packets.

Hope this information is useful.

Let me know if it worked.

Thank you, and in what concerns:

Umesh P - Microsoft Support

Visit our http://social.answers.microsoft.com/Forums/en-US/answersfeedback/threads/ Microsoft answers feedback Forum and let us know what you think.

Tags: Windows

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