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Bus-mastering EIDE drivers (provided for Windows 95 and Windows NT 4.0 operating systems) offer a performance improvement by off-loading certain functions from the system microprocessor during multithreaded operations. The bus-mastering driver for your operating system has been installed by Dell and is operative when you receive your computer. No further installation or configuration is needed.

A backup copy of the Windows 95 driver is provided with the Windows 95 CD. This driver will be reinstalled automatically if you reinstall Windows 95. However, the driver is disabled until you complete the steps provided in “Enabling the Windows 95 Bus- Mastering EIDE Driver” found later in this chapter.

The driver for Windows NT 4.0 has also been copied to your hard-disk drive in diskette-image form. If you need to reinstall or remove this driver, you can do so as described in the following subsections.

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NOTE: To install the bus-mastering EIDE driver for Windows NT 4.0, you must have a mouse connected to the system and Windows NT 4.0 must already be installed on the hard-disk drive connected to the primary EIDE channel.

To reinstall the bus-mastering EIDE driver for Windows NT 4.0, perform the following steps:

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The Program Diskette Maker is available through the Dell Accessories program folder. For more information, refer to the online help provided in the Program Diskette Maker.

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For instructions, see the next subsection, “Removing the Windows NT 4.0 Bus- Mastering EIDE Driver.”

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