Is there a way to have it in the center for both the lap top and PC?

There really shouldn't be any difference between the two, except that most lap top screens are smaller than desktop monitors. It's generally better to confine your text to a width of about 400-500 rather than stretching across the whole screen. There are two reasons for this. One, the smaller width will look the same on all browsers and two, it's easier to read. The page of a book is much thinner than a computer screen.

To center something in HTML you generally just have to put align="center" into a tag, such as <P align="center"> or <TD align="center">. In tables you can also set the vertical alignment with valign. For that center is the default, but you can change it to valign="top".

Wow, the reason posts go wide is that a link is a continuous string or characters without any spaces. PCs won't break that string and make the rest go on the
next line, so the page just stretches to fit the text. Macs will split the line for you.