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Saturday, 23 May 2009

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

Reference >> http://support.microsoft.com/kb/928233
Important
This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 (http://support.microsoft.com/kb/322756/ ) How to back up and restore the registry in Windows
To resolve this issue, disable the DHCP BROADCAST flag in Windows Vista. To do this, follow these steps:
  1. Click Start
    Collapse this imageExpand this image
    Start button
    , type regedit in the Start Search box, and then click regedit in the Programs list.

    Collapse this imageExpand this image
     User Account Control permission
    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:
    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.
  3. On the Edit menu, point to New, and then click DWORD (32-bit) Value.
  4. In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.
  5. Right-click DhcpConnEnableBcastFlagToggle, and then click Modify.
  6. In the Value data box, type 1, and then click OK.
  7. 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.

Saturday, 2 May 2009

Remove Saved Passwords In Windows XP

Windows XP gives you the ability to store user names and passwords on your local computer so you do not have to enter in your credentials each time you access different sites or resources. Of course this provides some simplicity for users that have to remember more than one user name and password. However, in terms of security, any one who sits down at your computer while you are logged on can then access sites and resources using your cached credentials.

You can view and remove the stored credentials on your computer using the following steps:

1. Click Start and select Run.
2. Type in rundll32.exe keymgr.dll, KRShowKeyMgr and Click OK.
3. The Stored User Names and Passwords dialog box will appear.
4. You can remove an entry by selecting it from the list and clicking the Remove button.
5. Click Close..
Remove Saved Passwords In XP