Installation of a new operating system or the re-installation of a current version of your operating system will require the reformatting of your hard drive. This means that when you attempt the install process your computer will first have to wipe clean all old information on the hard drive before writing the new software data to the hard drive. There are a few prudent steps to follow before and during the process of installing a new operating system onto your computer. Tips Warnings Writer Bio

How to Wipe a Hard Drive Clean   Install an Operating System - 97