Hello,
I use Irfanview to take my screenshots, which is a freeware utility off the internet. I save my screenshots into a separate folder on my hard drive and then utilise another freeware utility off the internet called Photoscape to enhance my screenshots, make them higher res, crop them to different sizes, amend the colours, etc, etc, then when I'm moderately happy, I can post them to the forums using a free hosting website, there's lots of them to choose from off the 'net.
Hope that gives you some fresh ideas.
Cheerz. ex-railwayman.