********************************************************************** Norton AntiVirus for Windows 95 README.TXT Copyright (c) 1995-1996 Symantec Corporation December 1996 ********************************************************************** HOW TO USE THIS DOCUMENT ********************************************************************** To view README.TXT on screen in Notepad or WordPad, maximize the Notepad or WordPad window. To print README.TXT in Notepad or WordPad, choose Print from the File menu. If you use another word processor, select the entire document and format the text in 10-point Courier before printing to ensure proper spacing. To print README.TXT from the DOS prompt, type COPY README.TXT PRN: ********************************************************************** NORTON ANTIVIRUS NOTES ********************************************************************** This README.TXT file covers compatibility information, late-breaking news, and usage tips for Norton AntiVirus for Windows 95. The following topics are discussed: * TECHNOTE.TXT and Virus Definitions Files * Internet Protection with Norton AntiVirus for Windows 95 * Microsoft Excel Macro Viruses Detected * Norton AntiVirus for Windows 3.x and DOS * Removing Viruses Before Installation on FAT32 File Systems * Inoculation Change Alerts * AUTOEXEC.BAT and NAVBOOT.EXE * Automatic Protection and Upgrading Software * Automatic Protection and Downloading Software * Auto-Protect (NAVAPW32.EXE, NAVAP.VxD, and SYMEVNT.386) * Modifying Rescue Disks * Win 95 System Shutdown and Auto-Protect * LiveUpdate and Internet Firewalls * Novell Client32 for Windows 95 * "HIMEM.SYS is missing" Message when Restarting Your Computer * CTL3D32.DLL Error Message * Installing from LFN Folders * Startup Scans and Removable-Media Drives * Pre-installed Dell P6 Power-Management Software TECHNOTE.TXT and Virus Definitions Files ---------------------------------------- In addition to README.TXT, Norton AntiVirus for Windows 95 includes a file called TECHNOTE.TXT, which is located in the folder where Norton AntiVirus is installed. TECHNOTE.TXT contains information about viruses that cause unique problems and require special handling, as well as statistics about recent virus outbreaks. Please refer to this file for important instructions about the One Half virus and other special cases. The TECHNOTE.TXT file is updated monthly by Symantec. The new version is distributed with updated virus definitions files, which Norton AntiVirus uses to catch newly discovered viruses. See Chapter 4, "Keeping Up with New Viruses," in the User's Guide for information on how to get the updates. Internet Protection with Norton AntiVirus for Windows 95 -------------------------------------------------------- As part of regular operation, Norton AntiVirus for Windows 95 with its default settings gives complete protection from Internet-borne viruses. No separate programs or Norton AntiVirus options changes are necessary. Auto-Protect scans program and document files automatically as they are downloaded and files within compressed files when they are extracted (Options\Auto-Protect tab\Scan on Created option). For users who disable Auto-Protect, Norton AntiVirus integrates seamlessly with Internet browsers. * Netscape and Norton AntiVirus At installation, Norton AntiVirus detects whether Netscape is already installed. If so, Norton AntiVirus installs itself as a Netscape helper application so that downloaded files are scanned for viruses automatically. If you install Netscape after Norton AntiVirus is installed, the easiest way take advantage of this protection is to reinstall Norton AntiVirus. * Other Internet Browsers and Norton AntiVirus If you choose not to use Auto-Protect, you can configure other browsers to use Norton AntiVirus as a helper application as well. To configure Internet browsers to use Norton AntiVirus, use the following command line as the application to launch for each MIME type and set of extensions: "C:\Program Files\Norton AntiVirus\NAVW32" /DOWNLOAD Don't forget to include the double quotes ("). If you've installed Norton AntiVirus in a different folder, change the command line to the proper location. The following table lists the standard MIME types and associated extensions. MIME type Extensions ---------------------------------------------------------------- application/octet-stream (Program Files Extensions List) application/binary (Program Files Extensions List) application/zip zip, lha, lzh application/msword doc, dot application/word doc, dot application/msexcel xlb, xlm, xls, xlt, xlw application/x-excel xlb, xlm, xls, xlt, xlw The Program Files Extensions List includes: 386, BIN, CLA, COM, CPL, DLL, DRV, EXE, NCP, NED, NNL, OCX, OVL, SCR, SYS, VBX, VXD For more information about helper applications and MIME types, consult your Internet browser documentation or help system. Microsoft Excel Macro Viruses Detected -------------------------------------- Norton AntiVirus now scans Microsoft Excel spreadsheets for macro viruses. To stay protected from all newly discovered viruses, be sure to use the new LiveUpdate feature so that Norton AntiVirus always has the latest virus definitions files. See Chapter 4, "Keeping Up with New Viruses," in the User's Guide for more information. Norton AntiVirus for Windows 3.x and DOS ---------------------------------------- Unlike Windows 3.x and DOS, Windows 95 defines a standard installation folder for applications. For Norton AntiVirus for Windows 95, the C:\Program Files\Norton AntiVirus folder is the default location instead of the C:\NAV directory. During installation older versions of NAV are disabled (because they don't work with Windows 95), but are not deleted. If you boot into your old operating system, you need to use your old version of NAV instead. If you do not intend to use your old operating system, you can delete the old NAV directory to free up some disk space. The NAVINOC.DAT files (inoculation data stored in \NCDTREE) from earlier NAV versions are reused automatically. The NAVOPTS.DAT (options settings) and EXCLUDE.DAT (exclusions list) files from earlier NAV versions are compatible, but not reused automatically. Because the NAV implementation for Windows 95 is sufficiently different from older versions, you should, at the very least, review your settings to maximize protection. See "Determining Your Risk Level" in Chapter 5 of the User's Guide for specific suggestions. If, however, you want to reuse the options and exclusions files from earlier versions of NAV, simply copy them into your Norton AntiVirus for Windows 95 folder. If you maintain an older operating system and use an earlier NAV version as well as Windows 95, you must keep your virus definitions files current for both versions. See Chapter 4, "Keeping Up with New Viruses," in the User's Guide for information on how to get the updates. Removing Viruses Before Installation on FAT32 File Systems ---------------------------------------------------------- If a virus is detected during Norton AntiVirus installation on your Large Volume Support (FAT32) file system computer, you must restart using a FAT32 boot disk (Windows 95 OEM Service Release 2) to remove the virus. Do not use earlier DOS versions. See the Norton AntiVirus installation card for the virus removal procedure. Inoculation Change Alerts ------------------------- When responding to an inoculation change alert, you must determine if the change is legitimate (choose Inoculate to let Norton AntiVirus generate new inoculation data) or the change indicates the activity of a virus (choose Repair to let Norton AntiVirus restore the item). The following examples demonstrate legitimate changes. In these cases you should choose Inoculate to let Norton AntiVirus generate new inoculation data. * Windows 95 If you are running Norton AntiVirus for Windows 95 and reinstalling Windows 95 (or upgrading from an earlier version), you may receive more than one inoculation change alert. Choose Inoculate, not Repair, to respond to the alert. Windows 95 modifies boot records and system files during the install operation and restarts your system more than once. Each time your system is restarted, these changes are properly detected by Norton AntiVirus. If you choose Repair, you are undoing some of the changes that Windows 95 is making and, therefore, corrupting your system files. You may not be able to start your system from its hard disk. If this occurs, start up from a floppy disk and reinstall Windows 95. * System Files Similarly, you may receive an inoculation alert at startup if system files have been modified as part of a legitimate change. For example, the Microsoft Powertoys Tweak UI applet modifies the MSDOS.SYS file. Choose Inoculate, not Repair, to respond to this alert. * Program Files If you use inoculation protection for program files, Norton AntiVirus reports an inoculation change when the newly installed file is accessed (or during a manual scan). Choose Inoculate, not Repair, to respond to the alert. In this case, the inoculation change is legitimate because it is a new file. * Partitioning Software If you use partitioning software (such as Partition Magic) or drive overlay software (such as Disk Manager and EZ drive), you may receive inoculation alerts for legitimate changes. When you set or modify partitions after Norton AntiVirus is installed, choose Inoculate, not Repair, to respond to these alerts. For example, Partition Magic may generate several legitimate inoculation alerts when setting or modifying partitions. If you choose Repair, your drive may be rendered inaccessible with little chance of recovery. AUTOEXEC.BAT and NAVBOOT.EXE ---------------------------- During installation, an entry is placed in your AUTOEXEC.BAT file to run NAVBOOT for startup scans, which run before Windows 95 starts (for example, @C:\PROGRA~1\NORTON~1\NAVBOOT.EXE /STARTUP). Whether or not the startup scan actually takes place is determined by your Startup tab settings in the Norton AntiVirus Options window. If, however, you remove the NAVBOOT line from your AUTOEXEC.BAT file, the startup scans can never occur, irrespective of your Startup tab settings. NAVBOOT is loaded from AUTOEXEC.BAT rather than WINSTART.BAT to ensure that it scans as early as possible during the system startup sequence. Automatic Protection and Upgrading Software ------------------------------------------- If you configure Norton AntiVirus to detect unknown viruses using the Virus Sensor feature, you may get unknown virus alerts when installing or upgrading software. This does not necessarily mean a file is infected with an unknown virus. As part of the process of installation (and expansion of compressed files) you may be overwriting existing files, which will trigger an alert. To prevent these alerts, right-click the Auto-Protect icon in the Windows taskbar tray and choose Disable to disable Auto-Protect temporarily before upgrading software. Afterwards, right-click the Auto-Protect icon again and choose Enable. Be sure to scan all new files. Automatic Protection and Downloading Software --------------------------------------------- If you configure Norton AntiVirus to monitor for virus-like activities or use the Virus Sensor feature, you may get unknown virus alerts when downloading program files from some online services. These alerts do not necessarily mean a file is infected with an unknown virus. The alert may be generated due to the way the file is transferred. For example, the CompuServe WinCIM program creates a file the size of the expected download when you begin a file transfer. During the transfer, the contents of this file are replaced with the data being downloaded. If you are downloading an executable program, Auto-Protect will properly notice that the file is being modified and alert you. Simply select Continue when the alert is generated to complete the download. If you frequently download programs, you can add exclusions for this behavior so that the alerts are not generated at all. For example, you could add exclusions for WinCIM for "Unknown virus detection" and "Write to program files." See "Managing exclusions" in Chapter 5 of the User's Guide for directions. Auto-Protect (NAVAPW32.EXE, NAVAP.VxD, and SYMEVNT.386) ------------------------------------------------------- Auto-Protect and Inoculation ignore disk label (volume label) changes to prevent false virus alerts. Viruses cannot use the disk label to infect your system. For the same reason, changes to the OEM ID in a boot record are not reported. By design, Auto-Protect does not report writes to a boot sector or master boot record if the new sector is identical to the one previously on the drive. For example, you may use a disk editor to write back the same data to a boot sector or master boot record. Modifying Rescue Disks ---------------------- Due to the number of product specific technologies used by manufacturers to configure and initialize hard disks, Norton AntiVirus cannot always create a bootable Norton Rescue Boot Disk automatically. To test your rescue disk, restart your computer from rescue disk 1, "Norton Rescue Boot Disk," and type C: to change to your hard drive. If you can access your hard drive, you can rely on the rescue disk in an emergency situation. Write-protect the disk and store it in a safe place. If, however, you cannot pass this test, you must modify the disk. In all cases, restart your computer from the newly modified rescue disk to verify proper operation. * Modifying a Norton Rescue Boot Disk for NT Dual Boot systems or Large Volume Support (FAT32) file systems You will not be able to start your computer from the rescue disk unless you transfer the operating system to the rescue disk. To modify the disk, start up from your hard disk, insert rescue disk 1, "Norton Rescue Boot Disk," in the A: drive, and, from a DOS prompt, issue the following command to transfer the operating system to the rescue disk: SYS A: * Modifying a Norton Rescue Boot Disk for Ontrack Systems 1 Choose Shutdown from the Start menu and select "Restart the computer in MS-DOS mode." 2 After your computer restarts, insert your Ontrack Disk Manager disk in the A: drive. 3 Type A:\DM and press Enter to run the Disk Manager program. 4 Choose "Maintenance Menu" from the main window Select an Installation menu. 5 Choose "Create Ontrack Boot Diskette." 6 Choose "Make this diskette an Ontrack Boot Diskette." 7 Remove the Ontrack Disk Manager disk and insert rescue disk 1, "Norton Rescue Boot Disk," in the A: drive. Make sure the disk is not write-protected. 8 Press Enter to accept the default switches (/P-). 9 When the operation is completed, write-protect the rescue disk. 10 Restart your computer using you Norton Rescue Boot Disk and type C: to change to your hard drive to verify proper operation. * Modifying a Norton Rescue Boot Disk for embedded driver systems Because embedded driver implementations are hard drive specific, you must refer to the documentation that came with your hard disk for instructions on how to create a bootable floppy disk that gives you access to the hard disk. In some cases, you will have to contact the manufacturer's technical support department. LiveUpdate and Internet Firewalls --------------------------------- LiveUpdate is the new, automatic virus definitions files update feature (see Chapter 4 in the User's Guide, "Keeping Up With New Viruses," for information). If your Internet connection is protected by a firewall, you may need to modify its configuration to use LiveUpdate. Use the following data to configure your firewall to permit access to the Symantec LiveUpdate FTP site. Host: update.symantec.com Outbound data port: 21 Inbound data port: 20 Protocol: FTP Consult your firewall's documentation for implementation details. Win 95 System Shutdown and Auto-Protect --------------------------------------- Auto-Protect is often configured to scan removable media devices for boot sector viruses during WIN 95 shutdown. While scanning the boot sector, Auto-Protect displays a text mode message that notes it is currently scanning a boot record. Some video boards and video drivers have problems switching to text mode after the WIN 95 shutdown screen is displayed and cause a system lockup. You can control whether or not the text message is displayed by merging the following Registry Entry files with your Registry: APMSGOFF.REG Prevents the AP text message from displaying APMSGON.REG Permits the AP text message to be displayed To merge a Registry Entry file with your Registry, simply double click the file from the Explorer or a My Computer window. Both files are located where Norton AntiVirus is installed. By default, this is the C:\Program Files\Norton AntiVirus folder. Note that if a virus is found, Auto-Protect will attempt to display a message irrespective of this setting. Novell Client32 for Windows 95 ------------------------------ A problem has been identified with the initial release of the Novell Client32 for Windows 95 and Auto-Protect. Under some circumstances, Auto-Protect can miss infected files when files are going between a NetWare 4.1 server and a Windows 95 client running the Novell Client32 software. Contact Novell for an upgraded version of Client32. "HIMEM.SYS is missing" Message when Restarting Your Computer ------------------------------------------------------------ On certain computers, including the Compaq Deskpro XL, you may see the following message when restarting your computer: HIMEM.SYS is missing. Make sure that the file is in your Windows directory. This error occurs only if you restart your computer with a warm boot (Ctrl-Alt-Del). If you turn the power off and then on again, or press the reset button, your computer starts properly. To prevent the problem from occurring, add the following line to the beginning of your AUTOEXEC.BAT file: SET DOS16M=2 After making the modification and saving your AUTOEXEC.BAT file, turn the power off and then on (or press the reset button) to restart your computer. CTL3D32.DLL Error Message ------------------------- The following message may appear during Norton AntiVirus installation: This application uses CTL3D32.DLL, which is not the correct version. This version of CTL3D32.DLL is designed only for Windows NT. Simply click OK to continue the install. The message is generated because an old version of CTL3D32.DLL is found on your system. Microsoft has updated CTL3D32.DLL to correct the problem (version 2.31). Installing Norton AntiVirus from LFN Folders -------------------------------------------- Norton AntiVirus cannot be installed from a long-filename (LFN) folder on a Novell NetWare server. Similarly, Norton AntiVirus cannot be installed from a long-filename folder on a Windows NT server if short-filename (SFN) aliasing is turned off. Startup Scans and Removable-Media Drives ---------------------------------------- If a large-capacity, removable-media drive is empty during a startup scan, Norton AntiVirus may report that it cannot access the drive. To avoid the message, simply leave a disk in the drive. Pre-installed Dell P6 Power-Management Software ----------------------------------------------- The Dell P6 power-management software includes a thermal shutdown component (TEMPSENS.VXD) that is not compatible with Norton AntiVirus. To disable this component, you must modify the following Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices Delete the "ThermalShutdown" entry. The other Dell power management features will not be affected. ********************************************************************** END OF FILE **********************************************************************