Provided you install Windows Vista/7 after Windows XP, Windows should handle the dual-boot process automatically and without issue. Thus, I ask two questions:
1.) Which OS is being installed first?
2.) Are both OSes installed to the same hard drive or different hard drives?
I will also note that you can install/run Windows XP in a virtual machine, enabling you to run old programs in XP within Windows 7. Free options include VirtualPC and VirtualBox, though you must supply your own copy of XP. You'll want at least 2GB of RAM, and 3GB+ for gaming, but it is easier and less hassle than dual-booting.
Hope this helps,
P.S. Don't worry about your English; it's better than that of many people who speak it as a first language.
Well, first of all since this is my first thread here, greetings from Malaysia and please excuse my not so good English usage which i'm pretty sure would be obviously noticeable but as long as it is still understandable then it wont be much of a problem right? haha lol ~
Anyway long story short, something which also happened to my friend before as we install 2 operating systems on our computers, windows xp for games and windows 7 for work, studies, etc etc ~
Works fine in the beginning, but however after some time, it just stops prompting for which OS we would like to enter, it just goes straight into windows xp.
Thus, now i'm doubting whether or not to do it all over again as i'm pretty satisfied with my current windows 7 but just going through some games compatibility issues ~
Also, i would know, is this a known issue or are we just the unlucky ones? haha, is there a proper solution to it anyway?
Once again, i'm sorry for my terrible English and thanks in advance for your comments kay? peace ~