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Network performance may be adversely affected when a Windows 2000-based computer accesses files on a server that is running an earlier version of Windows or a non-Microsoft Windows NT-based server. For example, if attempting to access shapefiles residing on a Windows NT server from a Windows 2000 machine, performance is slowed considerably.
When a file is opened on a server that is running an earlier version of Windows, the redirector does not set the proper flags to request opportunistic locking in an OpenAndX SMB. The Microsoft Help and Support Web page has a document that describes this issue. Search the Microsoft Knowledge Base for article ID Q301952 through the link to Microsoft Help and Support in Related Information below.
To obtain the fix that resolves this problem, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, follow the link to Microsoft Product Support Services Contact Information in the Related Information below.