It takes a while to get familiar with the MacBook keyboard when running Windows under BootCamp.
Simple thing like print screen could be a headache. Found this post which is very useful at least you know a on-screen keyboard is there to help you if your keyboard isn't connected or malfunctioned.
In MacBook print screen is simply 'alt+fn+F11' that'll capture whatever you have on your screen. If you have dual monitor like me that could be too much. You want just the selected window? You'll then need the on-screen keyboard and click 'alt+psc'. To hold a key then click the second key firstly you have to double click the first key, which will be highlighted, then click the second key.