if you mean windows explorer 7, then just download it from the Microsoft site.
Microsoft Office can be installed on both Windows Vista and Windows XP operating systems. Microsoft Office 2013 will not install on Windows XP.
Nowhere.
Yes
Yes, you can but you might have to install some updates which allow to see windows xp stations in vista mapping.
windows 7 has internet explorer 8, which is available for windows xp and vista as well.
You have to create at least one more partition for Vista. If you install Vista on the partition where XP is installed Vista will delete XP. To avoid such problem you have to have one more partition. When you do that just start the Vista installation process from XP and choose just created partition for Vista.
There is no rollback way to do it. You would need to reinstall XP fresh over the Vista install. Why do you want to do that anyway, is Vista not working for you?
No.
As long as the computer meets the system requirements for Windows Vista, yes.
No
I have MGI Photo Program on dicks, I had it on Windows XP. I Tried to install on my laptop, It has Windows Vista. Why won't it install on Vista
You can not simply downgrade to Windows XP from Windows Vista. If you want to completely remove Windows Vista in favor of XP, you will have to format the hard drive and reinstall the OS from scratch. Windows XP will not install on top of an existing Vista installation.