Can I buy a Microsoft Publisher disc to intall on Vista system?
sure it does
Yes.
Microsoft Office can be installed on both Windows Vista and Windows XP operating systems. Microsoft Office 2013 will not install on Windows XP.
If Vista came installed with the computer when new then it's against the licensing agreement of Microsoft to install it onto another computer. Windows is tied to the hardware of the computer so you can't install it onto other computers. If you bought the computer and a retail version of Vista at the same time then yes you can de-authorize the old one and install it onto another one.
You should buy an upgrade version of Windows Vista however your computer if running XP is likely not to be powerful enough to run windows vista. You should run Microsoft Windows Vista Upgrade Advisor before upgrading as this will show you any problems your computer may have running Vista.
Yes of course you can
You DO NOT have to wipe your hard drive or "downgrade" to run windows XP on a vista computer. Download and install Microsoft Virtual PC. its free and will allow you to run another operating system in a window of the current one you are running. You can have both!
Vista is operating system and without it you cannot run and do anytning on your computer, Microsoft office 2007 is software and you can run computer without it and search the web.
It can if it is included in a computer buying bundle.
no and yes
Yes it does. I have tried it on Vista 32 bit and Vista ultimate 64 bit and both worked fine as far as doing the simple work I was doing. One thing I had a problem with, but this is common to both Vista and XP, is opening Publisher files over a network when there are hundreds of files in the server directory. There's an irritating delay opening and saving network files, though this also happened under XP, but not Win 98. However don't think it will be improved by buying Publisher 2007 as it made the matter worse - unbelievably, you cannot set a default directory to be another computer on the network, only the computer Publisher is installed on, so this means big problems if you want several users working on and saving Publisher 2007 files to a server. Microsoft describes it as an oversight but haven't remedied it with a patch. Therefore in my experience of fairly basic Publisher files, 2003 works fine on Vista and has some features that are better than the 2007 edition.
You may buy a computer that has vista home premium and Microsoft office on it. But generally it does not come automatic with vista home premium, it is a separate program.