After you upgrade to Windows 98, you may experience one or more of the following symptoms:

•	Device Manager reports resource conflicts with your hard disk controller.
•	Your computer runs very slowly.
•	You cannot gain access to your CD-ROM drive in Windows 98 or in MS-DOS using real-mode drivers.

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This behavior can occur if Intel Bus Mastering drivers are installed before you upgrade to Windows 98.

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To resolve this behavior, follow these steps:

1.	Restart your computer, press and hold down the CTRL key until you see the Windows 98 Startup menu, and then choose Safe Mode.
2.	Click Start, point to Programs, and then click Windows Explorer.
3.	If it exists, rename the Ideatapi.inf file located in the Windows\Inf folder. For information about how to rename a file, click Start, click Help, click the Index tab, type renaming, and then double-click the "Renaming files" topic. NOTE: The Ideatapi.inf file is a hidden file. To view hidden files, click Folder Options on the View menu in Windows Explorer, click the View tab, click Show All Files, and then click OK.
4.	Rebuild the Windows 98 driver information database by renaming the Drvdata.bin and Drvidx.bin files located in the Windows\Inf folder.
5.	Click Start, point to Settings, click Control Panel, and then double- click System.
6.	On the Device Manager tab, double-click the Hard Disk Controllers branch to expand it.
7.	Click the hard disk controller, and then click Remove.
8.	If more than one hard disk controller is listed, repeat steps 6-7.
9.	Click OK.
10.	Restart your computer.

Windows 98 should enumerate the hard disk controller and install the correct drivers.

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