If you want to install Windows 8 on your computer, at first you must make sure that you have all the system requirements to install Windows 8, else you will face problems with the OS or the installation will not work. So make sure that you have minimum system requirements to install Windows 8.
16 GB of hard disk space
1 GHz processor
Minimum RAM - 2 GB if you want to install the 64-bit version of Windows 8.