Windows Vista Internet problem... PLEASE HELP!!!

I just installed Windows 7 from the Microsoft Store for my home desktop. Installed Great... no problems.. Except one... it seems ( like others I've seen on the forum) my wireless connection goes in and out.... and sometimes never connects. My other computers (one has vista- business th other XP) have no connection problems.... I have a Linksys WRVS4400N business router and Linksys CM100 Cable modem)... I'm somwhat of a novice.... so I don't know where to start... Thanks for your assistance.....