how to replace operating system?

Answer 1

To totally replace, you would reformat the drive, then install the new OS from a bootable medium, such as CD or DVD. Alternatively, you could create a new bootable partition onto which you can install the new OS, again from a bootable install disk. You may also consider upgrading an old OS to a new one as a "replacement" - (e.g. XP --> Vista, Mac OS 9 --> Mac OS X etc.). In this case, you probably don't need the bootable install disk, just an upgrade disk - pop it in and run it whilst using your current OS, tell it to upgrade, and leave it.

I'm not quite sure what your question is getting at; installing a new OS isn't as dificult as it sounds. It is pretty much sticking a disk in, following a few simple on-screen steps the installation presents you with, then going away for a couple of hours, coming back to a nice new OS.

Answer 2

Most of the Operating Systems like Windows are self starting when you insert the CD in the drive. If you have already have say Windows 98 and insert Windows XP or Vista CD, it will probably prompt whether you want the OS to be replaced. Pl. be more specific with your situation for a better answer.

Answer 3

you can only replace earlier versions with later versions. e.g replace windows 98 with windows xp.

you can also replace a version with the same version. e.g windows xp with windows xp.

To do this, put the cd that contains the desired replacement into the cd ROM and browse for the setup. then douldle click and follow the steps given.

NB You can never replace a later Operating system with an earlier one.