Yachting and Boating World forums: Virus - HOAX

It was a windows utility that is used to restore long file names. (Scandisk uses it sometimes)

http://www.symantec.com/avcenter/venc/data/pf/sulfnbk.exe.warning.html
If you have deleted this file, restoration is optional. Sulfnbk.exe is a Microsoft Windows utility that is used to restore long file names. It is not needed for normal system operation. If you want to restore it, there is more than one way to do this. See the information that follows.

NOTE: The instructions in this document are provided for your convenience. The extraction of Windows files uses Microsoft programs and commands. Symantec does not provide warranty support for or assistance with Microsoft products. If you have any questions, please see you Windows documentation or contact Microsoft.

Windows Me
If you are using Windows Me, you can restore the file using the System Configuration Utility.

1. Click Start and then click Run.
2. Type msconfig and then press Enter.
3. Click Extract Files. The "Extract one file from installation disk" dialog box appears.
4. In the "Specify the system file you would like to restore" box, type the following, and then click Start:

c:\windows\command\sulfnbk.exe

NOTE: If you installed Windows to a different location, make the appropriate substitution.

The Extract File dialog box appears.

5. Next to the "Restore from" box, click Browse, and browse to the location of the Windows installation files. If they were copied to the hard drive, this is, by default, C:\Windows\Options\Install. You can also insert the Windows installation CD in the CD-ROM drive and browse to that location.
6. Click OK and follow the prompts.
Windows 98
If you are using Windows Me, you can restore the file using the System File Checker.

1. Click Start and then click Run.
2. Type sfc and then press Enter.
3. Click "Extract one file from installation disk."
4. In the "Specify the system file you would like to restore" box, type the following, and then click Start:

c:\windows\command\sulfnbk.exe

NOTE: If you installed Windows to a different location, make the appropriate substitution.

The Extract File dialog box appears.

5. Next to the "Restore from" box click Browse, and browse to the location of the Windows installation files. If they were copied to the hard drive, this is, by default, C:\Windows\Options\Cabs. You can also insert the Windows installation CD in the CD-ROM drive and browse to that location.
6. Click OK and follow the prompts.
Windows 95 (or alternative method for Windows 98/Me)
If you are using Windows 95, you need to use the extract command. This can also be used on Windows 98/Me.

1. Click Start, point to Find or Search, and then click Files or Folders.
2. Make sure that "Look in" is set to (C:) and that Include subfolders is checked.
3. In the "Named" or "Search for..." box, type:

precopy1

4. Click Find Now or Search Now. If it does not exist on the hard drive, then insert the Windows installation CD and repeat the search on that drive.
5. When you find the file, write down the location of Precopy1, for example, C:\Windows\Options\Cabs. This is your Source Path.
6. The general form of the Extract command is:

extract \precopy1.cab sulfnbk.exe /L c:\windows\command

So if the source path is C:\Windows\Options\Cabs, then the Extract command becomes:

extract c:\windows\options\cabs\precopy1.cab sulfnbk.exe /L c:\windows\command

NOTE: If you installed Windows to a different location, make the appropriate substitution.

7. Click Start and then click Run.
8. Type the following, making the appropriate substitutions as previously noted

extract \precopy1.cab sulfnbk.exe /L c:\windows\command

9. Click OK.
For more information on how to use the Microsoft Extract command, see the Microsoft Knowledge Base document, How to Extract Original Compressed Windows Files, Article ID: Q129605