Booting from either partition of Harddisk

[Guest]

I formatted my computer with windows 7, now I formatted the second partition with windows XP unlimited 2007, but on start up, it boots straight with Windows XP. how can I have the option of booting from my Windows 7 on the first hard disk and my Windows XP on the second partition?

 

[evilgenius134]

You have installed the OS' in the wrong order.

Install XP first and then Win7 last to get the proper boot options.

 

[mosox]

When you boot does it show both OS?

Right click My Computer/Properties/Advanced/system startup.../ and look at the default operating system. Choose the one you want.