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Do you have a desktop computer or a laptop ?
What make and model is it?
Does it have a built in floppy drive ?
What size is the hard drive ?
What is it you want to do ?
Your mboard's bios Setup must already be recognizing a floppy drive.
A floppy drive must be listed first in the mboard's bios Setup Boot Order or similar settings in order to be able to boot from a bootable floppy disk.
Does your hard drive already have Windows 95 installed on it ?
If it doesn't WHY do you want to install Win 95 ?
If you can install Win 98 or newer, DO NOT install Win 95 !
It must be Win 95 version OSR2 or later in order to support USB devices and drives larger than 8.4 gb and drive partitions larger than 2.1gb
(e.g. the Win 95 CD must have "With USB support" printed on it) and your mboard and mboard's Bios must already have USB capability
Win 95 CDs are not bootable.
For Win 95 Upgrade CDs you must have at least the install floppies for a previous operating system available for Setup to examine.
If you boot the computer with a bootable floppy that provides CD drive support, you can run Setup from the Win 95 CD, but the hard drive must have partitions already made on it and formatted that the Win 95 version can recognize - FAT partitions for earlier Win 95 versions - FAT or FAT32 partitions for version OSR2 and later versions - if it doesn't, the floppy must have Fdisk and Format on the floppy in order for you to be able to make one or more partitions and Format it/them.