To screenshot any portion of the screen:
- 
Hold Control + Shift + F5 ( ) buttons on the keyboard. 
- 
Use your mouse to select the area you want to capture. 
- 
Click copy to Clipboard (bottom right of screen). 
- 
Click Control + V to paste. 
To screenshot a specific window:
- 
Hold Control + Shift + F5 ( ) buttons on the keyboard. 
- 
Click on the window you want to capture. 
- 
Click copy to Clipboard (bottom right of screen). 
- 
Click Control + V to paste. 
