I use a program called Irfanview for image viewing in Windows. It's a lightweight but useful program.
http://www.irfanview.com/
To quickly grab a screenshot of something of interest, press PRINT SCREEN (or ALT + PRINT SCREEN to grab only the active window). Then open Irfanview and paste (CTRL + v) the screenshot. You can quickly crop the image to your liking by dragging a box around it and pressing CTRL + y.
http://www.irfanview.com/
To quickly grab a screenshot of something of interest, press PRINT SCREEN (or ALT + PRINT SCREEN to grab only the active window). Then open Irfanview and paste (CTRL + v) the screenshot. You can quickly crop the image to your liking by dragging a box around it and pressing CTRL + y.