HOW TO MAKE DUAL OS IN ONE KOMPUTER

long time no update post, because there is no time now I wanted to share t dual boot after a lot of friends who want to know how to make the two into one computer os
to make the laptop / pc you to dual boot / OS, I recommend having a decent drive space, automatic yag is just in need of hard drive space, for the first I assume you already have an OS that is, can Windows 7.8, XP, vista , or ubuntu linux.
The first is the first partition on hardis String together, suppose you have partitions C and D, where C partition already installed Windows system that I mentioned earlier, to partition your hard disk, create a partition of D which is not part of the system, so that nti you more easily, give the name of the partition that you created, say E, F, G's up, whatever you like, allocate the right size, eg 20GB, up to you, which is important enough to install the OS to 2 nanti.saya recommend you if you want to wear dual OS / boot windows, keep your Windows XP first next isntal new install of windows 7, or 8, or will wear all three no problem.
okay next step is installing the OS 2.
for the actual installation is the same as the first OS install only the difference is the selection of the drive, make sure you remember the partitions and sizes, because it will be in the format so do not get one.
next I assume you have finished installing, the next stage set dual boot / OS, if using dual OS windows 7 and 8 may be smooth fine but when dual OS using win 7 with win XP will be no problem, this is why I recommend you install the first windows xp first, because if the first windows 7.8, the guarantee will be trouble yourself.
okay hopefully help .., for the dual OS windows with ubuntu linux will be much different than what I just mentioned,
good luck,, glad to help you, please do not hesitate if you want to ask about IT, please send an email to mozzes.iwanto @ yahoo.com. AND adityadancok@gmail.com
sorry if my English was a mess, because learning from google translate :D