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- åSystem 7 Notes
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- VirusScan is fully compatible with System 7, including virtual memory,
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- 32 bit addressing, and file sharing.
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- VirusScan is also compatible with the Power Macintosh.
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- Leave the VirusScan Extension in the Extensions folder. Do not move the
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- VirusScan Extension to the System Folder. The “Install VirusScan
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- Extension” command installs the VirusScan Extension in the proper
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- location in the Extensions folder. Do not move it.
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- If you try to repair an infected file, VirusScan may tell you that the file is
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- busy and recommend that you either restart using your “Virus Tools” or
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- emergency startup disk and try again or “rebuild the desktop.”
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- Restarting using your “Virus Tools” or emergency startup disk was
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- discussed in the “Quick Start” section above. Rebuilding the desktop is
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- discussed in the “Problem Clinic” section below.
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- You should also be aware that System 7 is completely immune to the
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- “Desktop file” viruses (WDEF and CDEF). These viruses never activate,
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- spread, or cause any damage under System 7. Both hard disks and floppy
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- disks are immune to these viruses under System 7. Since the VirusScan
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- Extension detects and blocks viruses when they first try to attack your
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- system, and since the Desktop file viruses never attack under System 7,
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- the VirusScan Extension will not detect them under System 7.
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- System 7 hard drives, however, often contain an old System 6 format
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- Desktop file. If you restart using an infected System 6 startup floppy,
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- this file can and will become infected by WDEF or CDEF. The virus will
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- only be active, however, when you start up your Mac with System 6. The
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- proper way to protect against this problem is to install a copy of the
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- VirusScan Extension in your System 6 System folder.
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- You should also be aware of a problem with System 7’s file sharing
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- feature. If you share a folder and permit write access to it by granting
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- the “make changes” privilege with the new “Sharing” command, it is
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- possible for files in the shared folder to become infected by a virus over
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- the network, even if you have the VirusScan Extension installed on your
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- Mac. The VirusScan Extension will, however, prevent the virus from
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- spreading to your non-shared folders. It will also completely block any
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- attempt by the virus to execute its viral code on your Mac or cause any
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- damage to your Mac.
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- We have always had the problem of viruses spreading over a network to
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- files in writable folders on dedicated AppleShare file servers. With
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- System 7’s file sharing, this has now also become a problem on personal
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- Macs.
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- Virus infection over the network is only one of many serious security
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- problems with writable shared folders. Writable shared folders are
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- inherently insecure, and no kind of anti-viral or other security software
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- can prevent damage to their contents. To minimize these problems, we
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- recommend that you limit write access to your shared folders to only
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- trusted individuals. Never grant write access to guests (“any user”). The
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- only way to eliminate the problems completely is to never grant the
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- “make changes” privilege to anyone except yourself.
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