Why do I receive memory or storage space errors after I install new software?

A. Windows XP, Windows 2000, and Windows NT all have an IRPStackSize value that controls how much physical storage space and RAM are available to new applications, and some new software installs incorrectly set this value. This value ranges from 11 to 20 for XP and from 11 to 15 for Win2K and NT. If you set this value to less than 11, you'll receive an error message indicating that the system doesn't have enough server storage. As a result, clients won't be able to access network shares and Event ID 2011 will appear in the System log.

To set the IRPStackSize back to the default (15 for XP, 11 for NT), perform the following steps:

  1. Start the registry editor (e.g., regedit.exe).
  2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters.
  3. Double-click IRPStackSize (or if this registry setting doesn't exist, create it of type DWORD and ensure the case is correct).
  4. Change the base to decimal, set the value to 11 for Win2K or NT or 15 for XP, and click OK.
  5. Reboot the computer.
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