Microsoft Windows gives you a notification whenever your wireless         network has a weak signal. This is a sign that you should improve your         wireless network. When you get this notification, it means that the         wireless connection is not as reliable or high-speed as it’s supposed to         be. In fact, the wireless connection signal may be completely lost in         certain areas of the house. If you would like to improve your wireless         network signal, you should carry out a few of these tips. These tips         will extend the wireless range. They will also improve the overall         performance as well as reliability of the wireless network.

Re-position the wireless router (or wireless access point) to the centre  of the house.

       Place the router away from walls.

        Place the router off the floor.

        Place the router away from metal objects.

        Instead of using a standard antenna which you get with the router, use a  hi-gain one. If the standard router is placed by an outer wall, part of  the wireless signals will be directed outside the house. This will also  waste the power of the router. Hi-gain antennas send the wireless  signals in a single specific direction which you are able to aim on the    path where you need them a large amount.

Replace  your laptop or computer’s wireless network adapter with a USB network  adaptor. It uses an external antenna that improves the range of the  signals. (Laptops which have built-in wireless normally contain outstanding antennas. They do not usually require to be upgraded.)

Add a  wireless repeater to extend the signal range.

Change the wireless router’s channel to increase the strength of its signal.  You can do that through the configuration page of the router. The  computer will detect the new channel itself.

Reduce  wireless interference by avoiding wireless electronics which use the         2.4GHz frequency. You should use cordless phones which use the 900MHz or         5.8GHz frequencies.

Update your firmware updates for your router through the manufacturer’s   website. Update your network adapter driver through the Windows Update   feature of Windows 7 and Vista or visit the website www.update.microsoft.com for Windows XP.

Upgrade         802.11b devices to 802.11g or buy a new 802.11 g equipment.  It is five         times faster than an 802.11b device.