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This article provides information about upgrading existing operating systems to Windows 95.
Upgrading MS-DOS, PC-DOS, or OEM-DOS versionsYou must be running MS-DOS, PC-DOS, or OEM-DOS version 3.1 or later to successfully install the Windows 95 Upgrade.
Upgrading Microsoft or OEM Windows or Windows for Workgroup VersionsWith the Windows 95 Upgrade you can upgrade Microsoft or OEM Windows version 3.0 or later or Windows for Workgroups version 3.1 or later to Windows 95.
Upgrading an Existing Installation of Windows 95After you have upgraded an installation of Windows version 3.0 or later or Windows for Workgroups version 3.1 or later to Windows 95, the Windows 95 Upgrade can be installed over an existing installation of Windows 95. This process is frequently performed as a troubleshooting step to ensure that no Windows 95 files are missing or damaged.
To install Windows 95 over an existing installation of Windows 95, follow these steps:
Installing the Windows 95 Upgrade on a New Hard DiskThe Windows 95 Upgrade does not include a bootable floppy disk. To install Windows 95 on a new hard disk, you must use MS-DOS, PC-DOS, or OEM-DOS version 3.1 or later to format the hard disk and make the hard disk bootable. After booting from the hard disk, run Setup from the Windows 95 CD-ROM or disks. If Windows 95 Setup is unable to detect an existing installation of Windows or Windows for Workgroups on the hard disk, it prompts you to insert disk 1 of the Windows or Windows for Workgroups disks. Insert Windows or Windows for Workgroups disk 1 in the floppy disk drive, press ENTER, and continue with Setup normally.