No idea why he finds it difficult.
Four ways.
1. Click File at the top left of the screen and then 'save as' or 'save page as'.
2. Open Paint - (Start - all programs - accessories - Paint).
Minimise Paint.
Press PrtSc
Maximise Paint
Right click - Past.
Voila
3. Use a free program such as Screenshot Captor
http://www.softpedia.com/get/Multimedia/Graphi c/Graphic-Capture/Screenshot-Captor.shtml
4. If Firefox is your browser, use the ScrapBook addon which captures webpages and organises them, like a scrap book