3.0 Using 32-Bit Disk Access By default, 32-bit disk access is turned off to prevent disk errors on some battery-powered portable computers. However, 32-bit disk access may run correctly with some battery-powered portable computers, such as the Zenith MasterSport SL. If you want to try using 32-bit disk access, select the 32-bit disk access check box in the Virtual Memory dialog box (choose the 386 Enhanced option in Control Panel). For more information, see Chapter 14, "Optimizing Windows," in the Microsoft Windows User's Guide. Caution: Before using 32-bit disk access on a battery-powered portable computer, it is highly recommended that you back up your hard disk. Because 32-bit Disk Access has not been fully tested on all battery- powered systems, you may receive disk errors while using it. .