Are these termites or winged ants?

those are the male carpenter ants, probably within the week you will be invaded by the queens, even bigger and red/black...by looking at your second picture, inspect the metal tubing that makes of the windows, you may find a small BB sized hole or gap left when they were put together. If those windows open left to right, but are never opened, they can be nesting in the track either above or under the window itself. There are products that have straws attached to treat such voids...you will know if you locate the nest site due to the ants will come pouring out.

the first one is not a termite, and is not carpenter ant neither, just Argentine ant. The second one is a subterranean termite swarmer. Good idea to do a professional inspection at your house.

They look more like some sort of fly to me. They do not look like winged ants we get in the UK and dont look like termites either. normally both of these have double wings termites with two large wings on each side. Ants tend to be slim bodied compared to termites but these seem quite wide.

http://www.pestking.com/termites_vs_ants.htm

The picture you posted looks kinda like a termite. Whatever, spray the living cr@p out of them, or vacuum them up. Here's some helpful sites with good pictures.

http://www.killtermite.com/flying-ants-winged-ants...

http://plantdiagnostics.umd.edu/level3.cfm?causeID...

These are definitely the reproductive stages of ants. I can't say for sure what species it is, though it very likely could be carpenter ants.