Installation of Windows is pretty straigh forward. So let's do it on Virtual Box. So I won't even botherto show it via screen shots.

In a nutshell we have to create Virtual Machine and on that virtual machine we will install the operation system:

Please follow the instructions below:

1. Virtual Box → Machine → New
2. Ordered List Item Create Virtual Machine → Fill Name, Machine Folder, Type and Version → Next
3. Memory Size → Choose how much you can spend (min. 1024 MBs) → Next
4. Hard Disk → Create Hard Virtual Disk Now → Next
5. Hard Disk File Type → VDI → Next
6. Storage on Physical Hard Disk → Dynamic → Next
7. File Location and Size → Fill the Directory Name and Size (Min 15 GBs) → Next
8. Right-Click On the Machine → Settings → Storage → Controller IDE → Optical Driver → Choose Virtual Optical Disk Drive (The Windows Image) → OK

For Windows installation, be sure that you have mounted the image in the previous step:

1. Double click on the Machine
2. Windows Setup → Choose Language, Country and Region → Next
3. Windows Setup → Install Now
4. Activate Windows → Enter the license Code → Next
5. Select System you want to install → Choose the one with GUI(Desktop Experience) → Next
6. Applicable Notice and License Terms → Accept → Next
7. Which Type of installation Do you want → Custom → Next
8. Where do you want to install the windows → Next
9. The installation will start, wait to to end and type the password → Next
10. Login → You can Login now in your newly installation Windows Server