Ok first off lets first review all your connections, make sure there all pluged into your router correctly making sure none of these are loose and if so try tape it in or somethingThen try disabling and reenabling the connection (if its coming from your router it should be your LAN connection)
If the problem persists try replacing some of the cables if this fails I would check your system for a conflict perhaps in drivers or software. At this point if you keep geting the problem id just ring your computer manufactors and complain alot.



Then try disabling and reenabling the connection (if its coming from your router it should be your LAN connection) 
)