Go into paint and go
Image>Resize/Skew and punch in around 30, 30 or 40, 40 in the top two boxes and you should have a decently sized picture.
Edit: Oh wait, you're dealing with computer screenshots? If so do experimenting with different numbers until you get the size you want. I used this 30, 30 for photographs measuring around 2200X2200 so yeah, it might be to small for you then.