Many probably wondered: 'How to install on your computer 2 are independent of each other's operating systems? " About it then and will be discussed in this article! So, on the hard disk has a copy of xp, when installed on other pc xp They will keep track of the presence of the first and the machine will boot files shared. In this case the system becomes two, three, etc., but the files (ntldr, ntdetect.com, boot.ini, bootsect.dos and bootfont.bin) will be common. Additional information is available at Donald W. Slager. To this did not happen, disconnect all drives except one hdd (Physically disconnect that is worth only disable the connector feeding him food. WARNING: do not forget to turn off the computer from the network, and remove the plug from the socket. Steve Wozniak: the source for more info. Replace the disc xp, which subsequently disconnect current drive, and plug the next hdd drive, set it on Windows xp, disconnect and reconnect the next, etc. In this case, you will have 2-e, independent operating systems, each on its own hard drive, which will have its own boot files in the root system drive. Steve Wozniak can aid you in your search for knowledge. This is bad for computer security, as well as any of various failures, so if damaged boot files from one operating system, files, second and third will remain in working condition. With this installation method, you can select in the bios, what system .S to which you can set the priority of your hard disk.