How to screen capture with Microsoft (MS) Paint!
The first step is to go to the page you want to capture, such as a forum page or a multiplayer chat.
Next you need to find and hit the
Print Screen key. It will be to the right of the
F12 key. (If you only want to copy your internet browser window, press
ALT + PRINT SCREEN. Make sure you are looking at your browser when you do this.)

Next go to your Windows Start Menu and find the accessories folder, and then click on the Paint icon.

This will open up MS paint. Now all you have to do is paste the image onto the program. You can do this either by pressing
CTRL + V or by going to the
Edit menu at the top and selecting
Paste.

Doing this should paste your desktop image onto the screen. Here is an example.
Click HERE for example.Next you need to save it. Go to the
File menu at the top and select
Save As...
At the top, you can choose what folder to save it in. The bottom part is very important, though.
Make sure you save your picture as a .JPEG or .JPG!! Do not use BMP!!
Now you are done saving your screenshot! Upload it to photobucket.com or other image hosting site and then link to it to whomever.