LTA Snipping Tool - [Windows Vista, 7, free, easy screen shot] #TLTGltas see: http://tlt.gs/ltas

LTA=Low-Threshold Applications/Activities.  See tlt.gs/ltas
"Snipping Tool captures a screen shot of anything on your desktop, like a picture or a section of webpage. Snip a whole window, a rectangular section of the screen, or draw a freehand outline with your mouse or tablet pen (or your finger, if you're using a PC with a touchscreen). Then you can annotate, save, or e-mail the image using buttons right in the Snipping Tool window."  


Avail for Windows Operating Systems Vista & 7, not for XP or earlier.
The image at the right was captured using "Snipping Tool" from browser view of Web page http://windows.microsoft.com/en-us/windows7/products/features/snipping-tool.  I then used the annotation tool to add the subheading.  The quality of the handwriting reflects my clumsiness with my right-handed mouse (I'm left-handed).
This is the easiest to use, simplest screen capture tool I've found to date.