I've been having wireless network problems so I recently purchased a new wireless adapter(Linksys wireless-N USB Adapter N600 dual band) and I still seem to be having issues. For example, when watching videos on youtube I click the HD option for the video and it selects it but the video quality doesn't change at all. Also, at times I will only be able to connect to certain webpages or sometimes I can't connect to any webpages or play any online video games but skype will work perfectly at the same time. . please help