Article ID: 174371
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Database programs running in Windows 95 OEM Service Release 2 (OSR2) or 2.1 (OSR 2.1) over a Microsoft network may damage the database.
When a program uses the GetFileSize() API to get the size of an existing file on a Microsoft networking server (such as a Windows NT-based server), the Client for Microsoft Networks may not return the correct file size. When the program then attempts to write additional information to the end of the file, it may overwrite existing data instead.
This problem has been observed only with the version of the Client for Microsoft Networks (Vredir.vxd) included with OSR2 (version 4.00.1111) and later.
This issue is resolved by the following updated file for Windows 95 OSR2:
Vredir.vxd version 4.00.1116 (dated 9/11/97) and laterTo install this update, follow these steps:
119591Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
(https://support.microsoft.com/kb/119591/EN-US/ )How to Obtain Microsoft Support Files from Online Services
The following files are installed by Vrdrupd.exe:
File name Version Date/Time Size Destination folder --------------------------------------------------------------------- Vredir.vxd 4.00.1116 9/11/97 11:16a 156,773 Windows\System Vnetsup.vxd 4.00.1112 5/30/97 11:12a 17,595 Windows\System
For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/172594/EN-US/ )Cannot Connect to Server with 15 Characters and Period in Name
(https://support.microsoft.com/kb/165402/EN-US/ )Windows 95 Update to Encrypt Passwords in Memory
(https://support.microsoft.com/kb/161100/EN-US/ )File May Be Truncated When Copied to a Full Network Drive
(https://support.microsoft.com/kb/157114/EN-US/ )"Access Denied" Attempting to Run File on LM/X Server
(https://support.microsoft.com/kb/152186/EN-US/ )Possible Network Data Corruption If Locking Not Used
(https://support.microsoft.com/kb/148367/EN-US/ )Possible Network File Corruption with Redirector Caching
(https://support.microsoft.com/kb/142803/EN-US/ )Hang or Locking Error Accessing Database Files Over Network
(https://support.microsoft.com/kb/140558/EN-US/ )Deleting Files on Samba Servers May Delete Local Files Instead
(https://support.microsoft.com/kb/138249/EN-US/ )Updated Vredir.vxd Corrects Errors Running Files on LMX
(https://support.microsoft.com/kb/160807/EN-US/ )Cannot Connect to Windows NT Server with Many Shares
(https://support.microsoft.com/kb/150215/EN-US/ )Disabling Automatic Network Shortcut Resolution
(https://support.microsoft.com/kb/138014/EN-US/ )File May Be Truncated to Zero Bytes When Copied Onto Itself
(https://support.microsoft.com/kb/136834/EN-US/ )Error Copying Read-Only Files to Core SMB Server