This page lists the fixes contained in the Microsoft® Windows® 95 Service Pack 1 Update.

1. OLE32 Update
   The Windows 95 OLE 32 update addresses file-management behavior in Microsoft Word, Microsoft Excel, and Microsoft PowerPoint® for Windows 95. Because of the way these applications use OLE for file storage, files created by these applications might contain extraneous data from previously deleted files. This data is not visible while you use the applications. However, when such a document file is viewed by using Windows Notepad (for example), it might be possible to see pieces of information from the previously deleted files. This could pose information security or privacy concerns if you distribute electronic versions of files created using these applications.

   The OLE 32 update addresses this problem. Although the problem is known to occur only in Microsoft Excel, Word, and PowerPoint for Windows 95, the OLE 32 update is designed to prevent any application from potentially causing the same problem.

   Notes

   • If you use Microsoft Office with Windows NT™, this problem does not affect you, because the operating system initializes (clears) any disk space used by deleted files.
   • If you use Microsoft Word 6.0, Microsoft Excel 5.0, or Microsoft PowerPoint 4.0 with Windows version 3.1 or on an Apple® Macintosh® computer, contact Microsoft Customer Services to obtain the "C" maintenance releases of these products. Early releases of these versions are known to have a similar extraneous-data problem, which is fixed in the "C" releases. If you use Microsoft Word 6.0, Microsoft Excel 5.0, or Microsoft PowerPoint 4.0 with Windows 95, you should also obtain the "C" releases of these products.

2. Microsoft Windows 95 Shell Update
   This update to Shell32.dll makes it possible to browse NetWare® Directory Service printers from the Add Printer wizard. The Add Printer Wizard is found in the Printers folder. This change is applicable to you if you have installed Service for NetWare Directory Services.

   This update to the Windows 95 Shell32.dll file also fixes a problem in which files copied onto themselves can be truncated to a zero-byte file size. This occurs only in the following circumstances:

   • When you copy a file onto itself using two different views of the same network resource (these can be different mapped drive letters or UNC connections to a network resource).
   • When you copy a file onto itself using a drive that was created by the SUBST command.

3. Windows 95 Common Dialog Update for Windows 3.1 Legacy Printer Drivers
   In Windows 95, when 32-bit applications print using Windows 3.1 monolithic drivers or the Windows 3.1 Pscript.drv / Unidrv.dll driver, the applications sometimes fail. This update addresses that problem.

4. Vserver Update: File and Printer Sharing for Microsoft Networks
   This update is for a problem with File and Printer Sharing for Microsoft Networks and a certain UNIX® network client (Samba's SMBCLIENT). The update corrects a problem with share-level security documented in the Microsoft Knowledge Base on October 9, 1995. The update also includes a correction for a similar problem with user-level security that Microsoft recently discovered as part of its internal testing of the new driver.

   Note

   • The phrase "Microsoft Networks" refers to Microsoft's networking software, not MSN™ (The Microsoft Network online service).

   Windows 95 enables users of the Samba SMBCLIENT to gain unauthorized access to the drive on which sharing is enabled by accepting certain specific networking commands. The Samba client is the only known SMB client that sends such networking commands. SMBCLIENT users do not automatically have access to the Windows 95 drive, and must know the exact steps to send these commands.

   The updated driver prevents Windows 95 from accepting these commands, preventing SMBCLIENT users from accessing the drive on which sharing is enabled. With the updated driver, an SMBCLIENT user will have access only to those shared folders that a Windows 95 user has designated.

5. NWServer Update: File and Printer Sharing for NetWare Networks
   This update is for a problem with File and Printer Sharing for NetWare Networks which might affect data security for corporate users. If your computer is configured for file and printer sharing and Remote Administration is enabled, another user on the network might gain read-only access to your computer after the administrator has logged off the computer and before you have restarted your computer. To correct this problem, Microsoft has issued an updated driver for File and Printer Sharing for NetWare Networks. The updated driver ensures that only valid administrators have access to the computer's drive.

6. Vredir Update
   The Vredir Update fixes a problem that affects only Windows 95 users who use Samba UNIX servers. The problem arises from the basic Windows 95 and UNIX filename formats. UNIX allows filenames that include the backslash (\) and asterisk (*) characters, but in Windows 95, these are wildcard characters. Suppose that a Samba server contains a file named \\server\share\*.*, a legal UNIX filename. If a Windows 95 user connects to that server and tries to delete the *.* file by using Windows Explorer, all the files on \\server\share are deleted instead. This updated version of Vredir prevents this from happening by rejecting filenames that contain the \ or * characters.

7. Windows 95 Password List Update
   The Windows 95 Password List Update protects your password file against potential security violations. When you connect to a password-protected resource, such as a network drive, you can choose to save that password. Windows then stores the password in an encrypted file on your hard disk. An algorithm was posted on the Internet for decrypting this file. If someone has access to your password file and knows the decryption algorithm, they may be able to decrypt it and the passwords it contains—and then gain access to the password-protected resources. The Password List Update provides vastly improved encryption that is 2^96 (2 to the 96th power) harder to decrypt than the previous encryption method.

8. Microsoft Plus! Update (System Agent Update)
   The Microsoft Plus! Update provides an updated version of Sage.dll to fix a minor problem with System Agent: When version 1.0 System Agent is running, programs that perform floating-point calculations might be slightly off in precision. This problem does not occur if System Agent is turned off.

   Note

   • If you do not have Microsoft Plus! installed on your computer, this update will have no effect on your system. If you install Microsoft Plus! at a later date (after the Microsoft Plus! Update has been installed), Microsoft Plus! Setup will leave the updated version of Sage.dll file on your system.

9. Printer Port (Lpt.vxd) Update
   This Lpt.vxd Update adds support for ECP (Enhanced Communication Parallel) port bi-directional communications used with certain printers (such as the Hewlett-Packard® LaserJet Series 4 and 5 printers, some Lexmark LaserPrinters, and possibly others). It may prevent timeout errors when printing.

   Note

   • The Lpt.vxd Update was also included in the Drivers\Printer\LPT folder on the Windows 95 CD-ROM; however, it was not installed by default during setup.