Microsoft Word, and Excel are nothing to do with the operating system. The programs will work with Windows 7.
No. Obviously, if you upgrade to Windows Vista, you will have Windows Vista.
After Vista, Widows is going to release their new OS, Widows 7. Windows 7 will debut sometime late 2009-2010.
It's something called "Windows Anytime Upgrade". To go to Vista Ultimate from Vista Business, it will cost you $139.00 Please make sure you're system is capable of running Vista Ultimate by downloading the "Windows Vista Upgrade Advisor" directly from Microsoft below: http://www.microsoft.com/windows/windows-vista/get/upgrade-advisor.aspx Now, read this page for "Windows Anytime Upgrade" : http://windowshelp.microsoft.com/Windows/en-US/help/37070041-1b90-4433-be0c-ab2855841b981033.mspx Hope this helps.
No your windows 7 will not deleted
Windows Vista upgrade home premium can be found online for $55 on a few sites. The Business version of Window's Vista upgrade can be found for around $150.
Do you mean upgrade to Windows 7 from Vista? Yes, without a doubt.
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.
All service packs
No
Yes.
No.
The real question is can you hardware handle an upgrade. I would check the Vista hardware requirements and make sure your PC is up to the challenge.