Originally Posted by sophielucky
How to install two operating systems in one computer at the same time?
Any response will be appreciated.
Do you need them running both at the same time or do you want to choose which operating system to go to at startup?
It you want to run them side by side you need to install one of the operating systems on the physical computer then install a virtual machine such as VMWare. After that install the second OS on the virtual machine. If you want to run XP on Windows 7, so long as you have Windows 7 Professional or Ultimate you can run something called Windows XP Mode which is free from Microsoft.
If you want to choose the "Dual Boot" option then install one OS then open the Disk utility function. Shrink the main drive and format the unused partition as NTFS. Then install the OS on the other partition. Once installed you should get a screen apear at startup asking which operating system to boot to.
Hope this helps.