If you are using a Wireless router, make sure it doesn't conflict with a cordless phone or wireless camera. Wireless routers come in three varieties; 802.11 b, g, and n (2.4Ghz) or 802.11 a (5.8Ghz) If you are using a 2.4Ghz Cordless phone and 2.4Ghz Wireless router then your Internet connection speed will slow while you use the cordless phone. The same is true of wireless security cameras. Check on your phone and camera, if it's 900Mhz then it's fine. If it says 2.4Ghz or 5.8Ghz then it could be the cause of your slow connection speed while they're in use.