Networking in Windows 7, DS Workstation Not Seen

It's been reported that Windows 7 computers become invisible on the network 20 minutes after bootup. A registry hack tested by Tony Jover has been working with no ill effects for months:

Two LocalMachine keys need to be altered to look like:
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\LargeSystemCache = 1
HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\Size = 3

A different firewall related fix is available at:

NVIDIA Card Setup to prevent monitor spanning with dialog boxes

(Added from TQ-J's comments to the List 10.17.2007 MH)

All the NVIDIA cards use Span for DS, but go into the Nvidia setup, and go to

Settings-->Advanced-->Quadro FX tab
Select "Additional Properties"
On the tab that opens on the left expand "Desktop management"
Select "Windows"
Check the top checkbox "Prevent windows from opening off-screen"
Select "Open windows on Analog Display 2 of 2" (Or 1 of 2, or any of the
other settings that you prefer)
Select "Reposition dialog boxes on Move to application display"

Apply all that and your windows will open up one monitor. It doesn't affect
DS in any way, other than the positive improvement that dialogue boxes open
up on one screen.

Adding a second Network Interface Card (NIC)

You can do this on some of the workstations. The example we have here is the xw8600:

I have used it for a direct link to an RP in the past by editing the "hosts" file found in C:\Windows\System32\drivers\etc\ on both machines, and adding the appropriate target machine's IP address to these files.
Edit the C:\Windows\slp.conf file by adding the following at the bottom of the file:
;net.slp.isBroadcastOnly = true

(Thanks to Tom Edwards)

Revised: Jul 18, 2011 10:56 am