I think this is because you don’t have the correct character encoding for your page (the validator doesn’t recognize the ampersand at the beginning of the escape characters).
A couple of things you could try:
Include the HTML5 !DOCTYPE declaration at the top of the document: <!DOCTYPE html>, or
Set the charset to utf-8 in the head section of the document: <meta charset="utf-8">
But to be honest, which version of Dreamweaver are you using? The code seems very poor and out-dated.
Is this code generated by Dreamweaver? If so, you shouldn’t be setting the width and alignment of a table data cell in HTML; that’s now obsolete and should be done with CSS instead. Also, there should be a space between the width and align attributes (i.e. between the " and align).
If you are just starting to learn HTML/CSS then I recommend using a stripped down text editor like Notepad++. Save the development suite for later when you have a handle on the fundamentals and begin reaching for tools you understand. You are cluttering your learning environment at a time when things need to be kept simple.
text editor
browser
This is all you need, apart from some bookmarks to documentation.