I need a clarification, whether all these partition are backed up or only factory backup is done, when recovery back up is created ???
And secondly, If I wish to reinstall windows 8 besides Linux, what are the steps to follow. And will these partitions (EFI, OEM, Recovery partitions) are automatically created or wiped out if formatted ???
You cannot install Windows XP on the system without a ground-up rebuild (XP will not work with a UEFI boot/GPT disc). Since XP goes completely end of life on April 9, 2014 (no more security updates), forget it - the OS is history.
Whether you can install Linux depends on finding a distro that supports EFI and GPT. A few do.
Before even attempting to install Linux, MAKE A BACKUP recovery USB drive (you'll need a minimum 16G flash drive to do so).