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When you attempt to upgrade from Microsoft Windows 95 OEM Service Release 2 (OSR2) to Windows 98, you may receive the following error message:
SU0013 Setup cannot create files on your startup drive and cannot set up Windows 98.
This behavior can occur if drive C on your computer is configured as a removable media device and the drive is using the FAT32 file system.
To work around this behavior, run Setup from within the MS-DOS environment:
Start your computer with a Windows 98 Startup disk. If you do not have one, you may be able to create one on any computer that has a CD-ROM drive. For information about how to do so, please see the following article in the Microsoft Knowledge Base:
187632 How to Create a Windows 98 Startup Disk that Supports FAT32
On the Startup menu, choose Start Computer with CD-ROM Support, and then press ENTER.
At the command prompt, type CD-ROM drive:\win98\setup, where CD-ROM drive is the drive letter assigned to your CD-ROM drive, and then press ENTER.