vim auto indenting new lines - how to disable this behavior?

Question

So let's say I have the following code:

if (true) {
    // do stuff
    // do additional stuff
}

I open up vim in PuTTY and right click to paste the above code into vim and it gets pasted like this:

if (true) {
        // do stuff
        //      // do additional stuff
        //      }

It's like it's auto-indenting every time a new line is encountered and the additional tabs just indent it that much further. And it also seems to be assuming that if the previous line was a comment that the next line will be one as well.

Even if I wasn't trying to copy / paste into vim it's not behavior I like but, the fact that I am makes the input barely usable.

Is there any way to disable this behavior?

Thanks!