My wireless router is a D-link DIR-615 (wireless N) - It has been working fine until we decided to move everything to another room. I didnt disconnect any cables etc just moved all the computer gears to a new room and now I cannot get any of my laptops to connect wirelessly. They are picking up the network ok but just cant connect to it. If I do a complete reset of the router and reinstal from the disk the laptops will connect but when they are turned off and restarted they again lose the connection and cannot reconnect. I think the router keeps losing or is unable to hold its IP address. I am not a computer savy person but previously it has worked fine from following the instructions. Any help would be appreciated.

I would start over again. I would shutdown Windows and power off all computers, unplug networked printers and network storage devics. Unplug any PCs from the wall (or flip master power switch on back of power supply, if yours is so equipped). This is necessary to remove the +5Vsb standby voltages across the motherboard which may be hold settings, one of which "Wake on LAN". Then unplug your router for a minute or two to reset it.

Do all computers connect via wireless? Or does one or more connect via Ethernet cable? I generally recommend going wired if possible, just because it is inherently more secure. But at any rate, every wireless network should have at least one wired computer for administrating the network via direct access to the router. Understand there technically is no such thing as a wireless router. "Wireless router" is a marketing term. A wireless router is typically 3 distinct, discrete network devices that just happen to share the same circuit board, case, and power supply. These devices are the router, a 4 or 8 port Ethernet switch, and a WAP - wireless access point. The WAP connects to the router via the switch too. The router connects to your modem, which is serving as your "gateway" device to the Internet. Note some products include the modem in the same case too.

Plug in the router and wait for lights to stabolize on the router and the modem. Connect and power up the wired computer, perferably a PC that will always used Ethernet, and make sure you can access the Internet with no problems. Log into your router and check "Connected Devices" and note the assigned IP addresses. This wired computer should be the only computer listed. Connect all other wired devices and make sure they function across the network properly. Note their IP addresses. You might reboot these computers to make sure they reconnect with no problems. If no problems, then you know the switch and router sides work fine.

Then one at a time, connect the wireless devices. Again, noting the IP address. No two devices on your network can have the same IP and I suspect there was a conflict before. Ensuring the wired devices (devices that don't come and go all the time) are configured first helps to prevent those conflicts.

Note you do not need to use any disk to connect to the network. I generally recommend you just use Windows own connect tools to get there. I would turn off and try to connect again after each wireless device. This is to ensure the wireless device and retained the correct new IP.