Intermittent and slow wireless internet connection

                  We are noticing lots of intermittent  and slow wireless internet connection issues and the fix which is working  to resolve  the issue to disable IPV6 option for windows 7  , check the link  http://support.microsoft.com/kb/929852

IPv6 can be disabled either through the Disabled Components registry value or through the check box for the Internet Protocol Version 6 (TCP/IPv6) component in the list of items on the Networking tab for the properties of connections in the Network Connections folder. The following figure shows an example.