Windows 2003: Loses connection to a network share on a Windows 7 machine

This has been perplexing us at work for a bit this week.  We have a Windows 2003 server which attempts to send its backup logs to a desktop PC.  It used to send it to a Windows XP machine, but that has now been replaced with a Windows 7 Professional workstation.

The problem is that everything works fine for 10-20 minutes at a time.  Then the Windows 2003 server will lose connection to the Windows 7 desktop and you will be unable to map to the share points on the Win7 machine until you reboot the Windows 7 desktop.

On the Windows 2003 server you will see:

C:> net view \\hostname.example.com

System error 58 has occurred.

The specified server cannot perform the requested operation.

This will also show up in the error log on the Windows 7 as:

Error 2017: The server was unable to allocate from the system nonpaged pool because the server reached the configured limit for nonpaged pool allocations.

The fix for this is two-fold and is all performed on the Win7 machine.  It requires editing a pair of registry entries on the Win7 machine.

1) HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\LargeSystemCache

This gets changed from "0" (zero) to "1" (one).

2) HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\Size

This gets changed from "1" to "3".

Reference links:

Windows 7 Nonpaged Pool Srv Error 2017
Systems Internals Tips and Trivia