Can't connect to internet unless I reboot

Your wireless network card in your computer is failing, or the cable to the computer is bad. Because you said wireless internet, I am going to assume that you are connected to the internet via wireless nic. If your pc hasn't been rebooted for a while you may want to try a reboot and see if that doesn't fix the issue.
However, if the problem remains you will likely need to get another wireless network card.

How many wired and wireless computers do you have ion the network.
Do you have any wired computer ?
Connect your laptop to the router with the Ethernet cable and try to access Internet. See if the wired connection is working or not.
If the wired connection is working then I think you will need to check the wireless settings of the router and the laptop.

Try following websites

Router setup
How to connect to the wireless network

Hi

For uninstall the driver of Wireless adapters follow the mention below instruction.

• Go to the control panel and click the Add & Remove program.
• You see the install driver list you have to select the your wireless adapters and click the remove.
• After few min you driver is uninstall the window show you driver uninstalling finish.
• Then reboot you computer.
• After rebooting you get New hardware found window in start up the notebook,take the wireless driver installation CD and put the notebook CD-ROM.
  
• And new hardware found window click next, automatic he install the driver in CD, after complete the driver installation reboot you laptop once more.
• Now you wireless adapter connect to Internet and your problem will solve.

If my answer solve you problem then give me 4 thum

Thanks

Plug your computer/laptop directly into router. Can you get to the Internet then?
If you CANNOT get to the internet when your computer is plugged into the router, reboot your router. If it doesn't have a power switch, unplug it. Leave it unplugged. Next, you need to figure out if you have another modem for DSL or Cable. If you do have another DSL or Cable modem, unplug that device to. After 5 minutes has elapsed for both devices being unpowered, plug in the DSL or Cable modem to the power source. Keep the router unplugged from power. After your DSL or Cable modem has powered up for 5 minutes, plug your router into the power source. Wait a few minutes. Reboot your computer/laptop. Try the wireless connection again.
If you CAN get to the internet when your computer is plugged into the router. Reboot your computer. Try to connect again. If you cannot connect after rebooting, make sure you are connecting to YOUR OWN wireless access point and not someone else's.
Do you have other computers/laptops/wifi devices that CAN/CANNOT connect to your wireless / access the Internet?

Try "rebooting" your internet. If it's fed through a router, disconnect the power to the router, as well as all of the connections, then reconnect them. Re-connect the power last.
Also, try moving closer to the source of your wireless internet. Sometimes the Dsi won't pick up on the signal because it has a weaker wireless receiver than a computer or most devices that will connect.

well!! I have an answer for you.your comp is loosing the IP address. goto start - programmes - accessories - dos prompt. type ipconfig.you`ll get ip address,subnet mask,default gateway.copy it. goto network and sharing center,click on view status,goto propertiesand double click on internet protocol(tcp/ip) or IPv4.type in the IP address,subnet mask,default gateway.in DNS server address type the default gateway in primary DNS and in secondary 4.2.2.2. your connection won`t drop after this.

Hello you can try to reinstall you wireless network drivers

delete wireless connections and reboot,insure you do not have the wired ehternet cable also installed, and insure that wireless switch is off as well for now. when system reboots, turn on the wireless switch and see if the program for IP is corrected.

Device communication issue! This sometimes occurs fro many reasons mainly FIREWALLS~ In order to keep this from happeninig you should probably setup a static address on your laptop or if your network has a SSID, it needs to be manually set into your adapter because it is not picking up your network. This often happens when you use your laptop in or on other networks. Easy fix, but need answers to these questions!

Well... That's an interesting problem.

Try changing the wireless channel that your router is running on via the web interface in the router. See what happens when you try to connect the "Tilt" then.

If that doesn't work, then find out if the Tilt is running on 802.11b or 802.11g. Disconnect all wireless devices from the router and change the router's Wireless standard to either B or G ONLY. (Whichever the phone is.) Connect the Tilt again without any other devices connected to the router. See if it reboots again.

Those are basics for now. I've never tried connecting a phone to a router like that before. Otherwise I would definitely contact your provider and ask them about it. Given that the WRT54G is the most common consumer-level NAT router on the market, they are sure to be having issues with it where other customers are concerned.

Unless another wireless device you have is causing the issue. But that is what you are trying to pinpoint with the above procedures.

Give it a go and see what happens.

Cyryl