How can I install multiple operating systems

Windows Dual Boot: Use two Windows systems in parallel


Windows can also run in different versions on one computer - at the start you simply select which one you would prefer at the moment. The prerequisite is of course that you also have a serial number for both.


If you're messing around with the operating system, you should make backups beforehand - We can only recommend this truism to you. There is always the possibility that something goes wrong and important data is missing. However, this is very unlikely here. In this article, we will explain how to create a Windows backup.

On the other hand, of course, you need a place where you can install the second Windows, i.e. one own hard drive or at least its own partition. Unfortunately, Windows does not offer a full-fledged partition manager during setup, so you should create a partition in advance. A simple, free tool for this would be the Easus Partition Master Free. If Windows gets its own new hard drive, you can do everything yourself in the Windows setup. Tip: Make a note of the names of the data carriers and partitions - this will be useful later!
This guide explains how to partition a hard drive under Windows.

Create boot medium

Naturally you need a boot mediumto be able to start the computer from there. You either already have one Windows DVD, or you can load the one you want Windows as an ISO file from Microsoft and play it on a USB stick. The easiest way to do this is with the free Unetbootin program: Under "image"specify the ISO file and under"drive"the inserted USB stick, via"OK"the ISO is then written to the data carrier in a bootable manner. Attention: Be careful when selecting the USB stick - if you choose the wrong drive, it will be completely deleted!
You can find detailed and illustrated instructions for creating a boot stick with the Media Creation Tool here.

Alternatively, of course, you can also use a Burn DVD. With a USB stick, it is possible that the computer does not boot directly from it. In that case you have to ins BIOS/ UEFI and change the boot order. You can get there by pressing a certain key shortly after starting the computer - usually this is [DELETE]. However, the mainboard manufacturers usually show briefly which key you use to access the Firmware management come. However, this is only a short period of time. A table with key combinations for BIOS access can be found here. In this UEFI / BIOS you have to look for Boot options and there after the sequence search, unfortunately this differs depending on the manufacturer. Once found, put that USB stick just to the top. If you remove the stick again, the computer will boot as usual.

Install Windows

So boot the computer from the stick or DVD; if your boot medium is recognized, the question appears on the monitor whether you want to start from what you do Confirm with any key. Confirm the subsequent Windows screen and start the installation. In this example, Windows 7 is installed next to an existing Windows 10 on a separate hard drive. The next question is which type of installation you want: upgrade or Reinstallation. An upgrade would overwrite the old Windows, so it is installed fresh.

The next important question: Where should Windows be installed to? Now select the one you want here Partition or hard drive. With a standard installation, your old Windows will probably be on "Disk 0 Partition 2" (Partition 1 is reserved by the system). To select the correct partition, the Notes from the partition manager useful. If there is a new, non-partitioned hard disk in the computer, you can use the "New"-Link create a new partition of the desired size and then format it.

The usual one follows Windows installation routine with questions about username, computer name, network and so on - there are no dual-boot-specific settings waiting for you.

Start system

After the installation is complete, restart the computer. You either have to remove the boot medium or answer the question whether you want to boot from it in the negative. You will see: Windows does not start by itself, one comes instead Query which Windows you want to start - and that's it with the facility. The two installations have nothing to do with each other, except that they appear together in the boot manager.

Before you set up such a system, however, you should consider whether you really need it - because one is often Virtual machine the simpler solution. For example, if you need a second Windows to run certain programs, to test software safely or because you want to have a separate system for work, a VM is simply more convenient. The dual-boot system is only the first choice if you need full hardware performance on both systems or if two users simply need their own Windows.