Microsoft Office
Switching from Office 2003 to Office 2007 - Click where you found an option in Office 2003, and this site will show you the new location.
Microsoft Office Alternative
Microsoft Office is a little spendy (between $150 and $700) for most people. If you are wanting a Word Processor, Spreadsheet and Slide Presentation Creator to use for yourself or for your business, you should consider using Open Office, which is a professional grade product, but without all of the costs involved in using a Microsoft product.
The most obvious cost is money. Open Office is a free for anyone to use, forever. Microsoft Office will cost at least $100, and that's if you get it on sale.
But, there are other costs involved as well. With Microsoft Office, you will be asked to purchase a new version of the program every three or four years, at almost the same price you paid for the original product. Open Office has no hidden fees, and will not charge you to upgrade.
Microsoft Office uses what is called a Proprietary file type. This means that no one else is allowed to make a program that uses their file types. Open Office uses the Open Document standard, which any program has free access to use, and is the standard in may various programs. This means that if you start using Microsoft Office, you will become stuck, and unable to freely switch from using one program to using another program.
You might not think this is an issue for yourself, since you are not planning on changing what program you use, but consider what will happen when Microsoft (or any other proprietary software) drastically changes the way a program that you have been using works? You will be forced to upgrade eventually, and you will have no choice but to move to the new version. You have been locked in, and there is nothing you can do about it. If on the other hand, you had made sure you were using an open format, you can just find a new program that works like you want it to, and the transition will be seamless.