Cannot install any games at all

[Natipha]

Hi im Natipha.
My laptop is not allowing me to install games,and i don't know why. It keeps on telling me to check my firewall settings each time the downloading is nearly finished. Please help me.
My laptop is an: Acer Aspire 5742Z

 

[rgd1101]

What the exact message? Where are you downloading from?