You have two options when installing Windows 95. You can either install over the original Windows directory, or install Windows 95 into its own directory.
If you choose to install Windows 95 over your original version of Windows, you will have all your software automatically available to run under Windows 95. There will be an option to de-install Windows 95 if you run into any problems.
If you choose to install Windows 95 into a separate directory, you will have the option to start your computer with your previous DOS Setup. However, you will find that you will have to re-install some of your applications to run under Windows 95.
Windows 95 requirements
1. Operating systems requirements
For Windows 95 to be installed as an upgrade to an existing computer system, the minimum requirements for the system are:
MS-DOS v3.2 or higher version.
An equivalent version from the hardware manufacturer that supports partitions greater than 32 Mb.
It is recommended however that you upgrade from MS-DOS 5.0 or a later version.
Windows for Workgroups 3.1.
Dual boot OS/2 (with MS-DOS).
Dual boot Windows NT (with MS-DOS).
1.1 Windows 95 Setup requirements
You will be asked to supply a user name, computer name and workgroup name if the computer is connected to a network.
The Setup program needs at least 417K of conventional memory to run. The amount of disk space required varies depending on the type of hardware on the computer, the required drivers and the optional components installed.
The approximate disk space requirements for a new installation are:
A [compact] installation that will take 30 Mb.
A [typical] installation 40 Mb.
For a Windows 3.1 upgrade:
A [compact] installation will take 20 Mb.
A [typical] installation 30 Mb.
For a Windows for Workgroups upgrade:
A [compact] installation will take 10 Mb.
A [typical] installation 20 Mb.