Computer disconnects from Internet when my neighbor is using his computer

You can check your connection if everything is properly connected.,
MOdem should be on the INTERNET port, The computer should be on the LAN port.
Sometimes wireless security is also causing the problem.
You can check your security by goin to the wired computer.
Open a browser and type in the address bar 192.168.1.1,
No username password is admin.
Click on wireless tab and then click on the wireless security.
Check these settings and then go back to your laptop disconnect and then reconnect again.

Cheers
KJ

if it's a tower... you'll need a linksys pci wireless card... and a linksys router... install the drivers first... then... with the computer off... follow instructions for installing the card... connect the antenna... and then turn on. wiat for the computer to boot... it should automatically find the card... now... on the back of the cable modem... disconnect the wire that was going to the computer... and put it in the connection on the router that says "internet", now... disconnect the cable modem... wait 30 seconds... then plug it back in... wait 1 min. for everything to come up... now... connect the power to the router... and wait 1 min... go to the linksys icon in the taskbar... and double click on it... survey the site... when you find the wireless networks that are avil... choose the one that's got the strongest signal... and click connect. now... open the internet broser... and go to tools... internet options... then connections, down at the bottom... you'll see lan... click on it... you should see a box that says automatically detect settings... make sure this is checked...then click apply... then on o.k... and exit the internet.... then go back in... you should have internet...

Is it disconnecting through the router or modem?
If it getting disconnected through the modem, then first check whether it disconnects through the modem.
connect the computer directly to the modem and check whether it works properly or not?
If it is working properly through the modem then there must be a problem with the router.
try to upgrade the firmware of the router.
Click Here for more info about networking

Intermittent Connectivity:
NOTE: Before following the steps in this article, check if your wireless computers have stable connection when connected to other wireless networks (hotspots).
This article assumes that all wireless computers are experiencing intermittent wireless connection with the Linksys router.
Frequent wireless disconnection can be caused by different factors such as:

1. Wireless interference within the network.
2. Wireless settings of the Linksys router are still set to default.
3. Firmware is corrupted.

Reducing Wireless Interference
If you are experiencing frequent disconnection from the wireless network, it helps if you check the following factors, all of which can greatly affect your wireless signals:
your cordless telephone system (or even your neighbors’), or other nearby equipment. Try to change your router’s channel to 1 or 11 (the default channel is 6) and restart the wireless computers.
Physical obstructions: Your router or wireless computers may be losing connectivity because of physical obstacles such as walls and floors. Try to move the equipment to different locations to find a better link.

• Placement of the router: Linksys suggests that you place your router as high off the ground as possible. When placing the router in a high location, leave a distance of two feet between the router antenna tips, ceiling, and wall. If your signal passes through multiple floors, place the router on the upper-most floor, and high up in the room.
• Surroundings: Keep the router away from large metal objects, bodies of water (fish tanks, bathrooms), and any electrical equipment including television sets, microwaves, radios, etc.

Customizing Wireless Settings of the Router
Having default wireless settings on the Linksys router may cause conflict with other Linksys routers within your network range. Linksys suggests changing the SSID (network name) and the Wireless Channel of your router. Also, if it is possible, enable the Wireless Security of your router.
To change the router’s SSID or the wireless network’s name, click here.
To change the router’s channel, click here.
To enable the wireless security on the router, click here.
NOTE: If the wireless connection remains unstable after performing the steps above, upgrade the router’s firmware. For instructions, click here

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

Intermittent Connectivity:
NOTE: Before following the steps in this article, check if your wireless computers have stable connection when connected to other wireless networks (hotspots).
This article assumes that all wireless computers are experiencing intermittent wireless connection with the Linksys router.
Frequent wireless disconnection can be caused by different factors such as:

1. Wireless interference within the network.
2. Wireless settings of the Linksys router are still set to default.
3. Firmware is corrupted.

Reducing Wireless Interference
If you are experiencing frequent disconnection from the wireless network, it helps if you check the following factors, all of which can greatly affect your wireless signals:
your cordless telephone system (or even your neighbors’), or other nearby equipment. Try to change your router’s channel to 1 or 11 (the default channel is 6) and restart the wireless computers.
Physical obstructions: Your router or wireless computers may be losing connectivity because of physical obstacles such as walls and floors. Try to move the equipment to different locations to find a better link.

Placement of the router: Linksys suggests that you place your router as high off the ground as possible. When placing the router in a high location, leave a distance of two feet between the router antenna tips, ceiling, and wall. If your signal passes through multiple floors, place the router on the upper-most floor and high up in the room.

• Surroundings: Keep the router away from large metal objects, bodies of water (fish tanks, bathrooms), and any electrical equipment including television sets, microwaves, radios, etc.

Customizing Wireless Settings of the Router
Having default wireless settings on the Linksys router may cause conflict with other Linksys routers within your network range. Linksys suggests changing the SSID (network name) and the Wireless Channel of your router. Also, if it is possible, enable the Wireless Security of your router.
To change the router’s SSID or the wireless network’s name, click here.
To change the router’s channel, click here.
To enable the wireless security on the router, click here.
NOTE: If the wireless connection remains unstable after performing the steps above, upgrade the router’s firmware. For instructions, click here

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

Make sure that your wireless mode is set to "mixed mode".

Intermittent Connectivity:
NOTE: Before following the steps in this article, check if your wireless computers have stable connection when connected to other wireless networks (hotspots).
This article assumes that all wireless computers are experiencing intermittent wireless connection with the Linksys router.
Frequent wireless disconnection can be caused by different factors such as:

1. Wireless interference within the network.
2. Wireless settings of the Linksys router are still set to default.
3. Firmware is corrupted.

Reducing Wireless Interference
If you are experiencing frequent disconnection from the wireless network, it helps if you check the following factors, all of which can greatly affect your wireless signals:
your cordless telephone system (or even your neighbors’), or other nearby equipment. Try to change your router’s channel to 1 or 11 (the default channel is 6) and restart the wireless computers.
Physical obstructions: Your router or wireless computers may be losing connectivity because of physical obstacles such as walls and floors. Try to move the equipment to different locations to find a better link.

Placement of the router: Linksys suggests that you place your router as high off the ground as possible. When placing the router in a high location, leave a distance of two feet between the router antenna tips, ceiling, and wall. If your signal passes through multiple floors, place the router on the upper-most floor and high up in the room.

• Surroundings: Keep the router away from large metal objects, bodies of water (fish tanks, bathrooms), and any electrical equipment including television sets, microwaves, radios, etc.

Customizing Wireless Settings of the Router
Having default wireless settings on the Linksys router may cause conflict with other Linksys routers within your network range. Linksys suggests changing the SSID (network name) and the Wireless Channel of your router. Also, if it is possible, enable the Wireless Security of your router.
To change the router’s SSID or the wireless network’s name, click here.
To change the router’s channel, click here.
To enable the wireless security on the router, click here.
NOTE: If the wireless connection remains unstable after performing the steps above, upgrade the router’s firmware. For instructions, click here

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

May be your router internet settings has been wrong. you must reset the router settings by clicking the router reset button. Pls locate the button and then put the internet cable into router internet port.

Did you move the router out of range of the computer? It sounds like you put it back where it was but I just thought I'd ask.

Otherwise, use your wired connection to check the router settings. It is possible that the wireless settings defaulted due to the disconnection. You can either set the router to match your wireless computer if you can remember, or just set up a fresh wireless connection between the two.

Hi ian90,

Since u r using a linksys products no need to worry..it will work..

In the right bottom corner of ur computerscreen u can see a green square box(linksys

wireless icon) right click on to the green box and click on "use windows Zero

configuration" after clicking on to that u can see a small computer with wireless waves in the right bottom corner,right click on to it click on connect to a wireless network..u can see ur SSId click to connect it...it will prompt for a network key..enter the key and confirm the key..it will connect for sure..hope it will work..if there is any issue just revert back as soon as possible..

You will need to get a wireless USB network adapter. The cost starts at 39$..You will get a good one for abt 50$.Next contact a wireless internet  service provider...And he will have it setup for you .This is easy to use and after using it you can just disconnect the USB device and keep it out of reach of your brother..
Regards,
Eagle!