Why does Microsoft Word think that this sentence is a fragment?

The sentence is, "The widespread ownership of the automobile allowed people to travel to exotic places." It is the only flaw in my essay according to word. What is grammatically incorrect about it?

How do it get into mining or panning for gold?

Honestly, you'll make more money by picking up aluminum cans. If any place is known to have pannable gold, someone owns it now. And if it's not known to have gold, then nobody can tell you about it. Most of the gold that was easily available has been found, you'll need to actually dig a mine to get any other gold.

MY Top 10 Favorite Rappers?

1. Wiz Khalifa, My favorite rapper, he is chill as **** and is just exploding into the hip hop world

What do you think Halo 4 will consist of!?

Halo 4 just announced yesterday! Do you think there will be the Covenant? Or forerunners? What was the giant ship? Halo: Reach weapons and abilities involved!

What do you think of the beggining of the first ch. of my novel? (only a couple paragraphs)?

it's so good! I love the way it's mysteriously pulling and grabbing at the reader, and it really makes me want to read more. by the way thx for commenting on mine

Please! Need help with a crazy mouse!!?

Make sure the mouse isn't too far away from the receiver my mouse used to do the same thing because the receiver was too far away

Which computer should I get?

ok well both are built for gaming not just school work so .. no need for two Graphics Card if u use one monitor that is a wast of money for others tat read this it can help but not for what he is looking to use it for and if u are not tech savy i would not recommend a RAID set up.. but if i would have money for ether one ... i would get the M17 it has more but i would not have a RAID set up ..