For Windows 95/98

First of all you will need the following
Your Microsoft Windows 95/98 CD
All discs for hardware
All discs for your software
First of all you will need to boot your PC into Windows. Once you have done this, you need to go Start then shut down and select from the drop down menu "Restart in MS-DOS Mode."

once you have done this, type cd\ and press enter. Then type format c: with a space in between the format and c. It will then ask you if you want to continue, just type y and then press enter.

Once this is done i always type c:\dir this is to make sure there is nothing on the drive.

For the next stage you MUST HAVE MS-DOS on floppy disks.

staying in MS-DOS place in your floppy drive your MS-DOS disks to reinstall DOS on your system. Once the disk is in the drive press ctrl alt and del all at the same time. Once your computer restarts it should read the disk that is in the floppy drive and start to install MS-DOS. You will get a few prompts and then just let it install. After installation of DOS take the disk out the floppy drive and open your CD Rom drive and place your Windows CD in. then i usually type D:\ and then return but obiously substitute the letter for your drive. You will then get D:\ .

After this you will type setup. So you will have something that looks like this.

D:\setup

press enter

D:\SETUP

enter

Setup for Windows 95/98 will then start and then just follow the on screen prompts.

For Windows ME

Just do the above again but with in Windows 95/98 open your CD-Rom drive and place the Windows ME disk in. You will then get and auto run box appear. Choose "install Windows ME."

Follow on screen prompts to set it up. Once installation is complete you WILL need to install all your applications and software for your hardware.

For Windows 2000

Within Windows 95/98/ME place your Windows 2000 in your CD Rom drive and follow on screen prompts to install Windows 2000.

For Windows XP Home/Professional

If you have the upgrade version just do the same when within Windows 95/98/ME/2000.

If you have the full version you will need to reformat your hard drive (Follow the part labelled Windows 95/98). After you have done this place your Windows XP CD in your CD Rom drive and press ctrl alt and del all at the same time and your cd rom drive should read the XP CD and start to install. Just follow the on screen prompts to install. For Windows XP you may find it best if your hard drives file system is NTFS. But dont worry if it is not.

EDIT: For Windows 95/98 before installing you MAY need to install your cd rom drivers.

If you need any boot disk drivers, head over to Bootdisk.Com

Hope this guide is useful