Continually Losing Wireless Connection To Windows 7

I recently purchased a wireless router and we have three laptops and a desktop using it. All other stay connected except my notebook which has windows 7. I also recently downloaded skype to talk to family overseas. Almost every time I am having a conversation, I suddenly lose the connection. However, I lose a connection at other times also. Skype doesn't have to be running for it to lose the connection. There seems to be no ryhme or reason for this. I ran a scan on my virus protection, but it reveals no threats. I am not so computer savvy either, only the basics.