Windows 7: Default gateway 0.0.0.0 trouble

Sometimes my nic received correct dchp address, but with faulty default gateway 0.0.0.0 instead of real one. So my LAN was functioning but i didn't have internet access.
Adobe Bonjour service is the cause. Disable it or totally remove with the following command:

"C:\Program Files\Bonjour\mDNSResponder.exe" -remove

Slow Network copy and connection drops in Windows 7

If you experience Slow Network Connection or file copy from and to the Windows 7 PC or laptop takes ages to completes or connection disconnects then this could be caused by the Task Offload settings. The task offload settings are enabled by default at the NIC level and globally at the system level. This should work for Windows Vista as well.

These could be

TCP Checksum Offload
UDP Checksum Offload
TCP Large Send Offload
IPSec Offload

To quickly resolve the problem, disable Task Offload globally that disable all the above Offload settings by doing the following:
1. Click Start and type “cmd” at the search box.
2. Right-click “cmd” icon and select “Run as Administrator“. This should lainch the command prompt with elevated permisions.
3. Run the following command to check the enabled offload tasks:

C:\Windows\system32> netsh int ip show offload
Interface 11: Local Area Connection
ipv4 transmit checksum supported.
udp transmit checksum supported.
tcp transmit checksum supported.
tcp large send offload supported.
ipv4 receive checksum supported.
udp receive checksum supported.
tcp receive checksum supported.

3. Run the following command to disable all Task offloads:

C:\Windows\system32> netsh int ip set global taskoffload=disabled

also try the following
netsh int tcp set global rss=disabled
netsh int tcp set global autotuninglevel=disabled
netsh int tcp set global chimney=disabled   

OK.

This should disable all the offloads.
4. Disable and Enable the NIC from “Control Panel – Network and Internet Connections – View Network Status and tasks – Change Adapter Settings“.
5. To check if all Offloads are disabled run the following command:

C:\Windows\system32> netsh int ip show offload

Nothing should be listed. This should help.
Also you may try disabling the power management option on the NIC as follows:
1. Click Start, right click “Computer” select Properties.
2. Click Device Manager. Right-click your NIC and choose Properties.
3. Choose Power Management tab and uncheck “Allow the computer to turn off this device to save power.”
4. Restart the computer and check if it works.
This should help especially with the Network disconnects.

Additional solution. Disable Remote Differential Compression.


1. Click Start – Control Panel – Programs – Trun Windows features on or off

2. Uncheck “Remote Differential Compression” and click OK.
3. Restart the computer and you should see an improved performance with copying files.

Source:  http://www.windowsreference.com/windows-vista/slow-network-copy-and-connection-drops-in-windows-7/
Source: http://www.windowsreference.com/windows-7/slow-network-file-copy-issues-in-windows-7-caused-by-remote-differential-compression/

CMD: How to count the number of remote users connected?

 Use command:
 query session /COUNTER

Windows 7: where is control userpasswords2 ?

Windows 7 now doesn't recognize the command 'control userpasswords2' in Start search box. Instead you can launch it through the command-line (or by typing Win + R).
Moreover you can type 'ntplwiz' in search box to open the Advanced User Accounts applet.

Disabling the Office Clipboard

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


When you add the following registry entry, it prevents the Office Clipboard from automatically appearing when you perform multiple Copy commands in any of the Office programs. To add the AcbControl registry entry, follow these steps:

1. Quit any programs that are running.
2. Click Start, and then click Run. Type regedit and click OK.
3. In the Registry Editor, click to select the following subkey (folder):
HKey_CURRENT_USER\Software\Microsoft\Office\9.0\Common\General
4. On the Edit menu, point to New and click DWORD Value. With New Value #1 selected, type AcbControl, and then press ENTER.
5. On the Edit menu, click Modify. In the Edit DWORD Value dialog box, click Decimal under Base. Type 1 in the Value data box. Click OK and quit the Registry Editor.


NOTE: To turn on the Office Clipboard, repeat step 5 above, changing the value from 1 to 0.