No internet connection

If you have a backup, feel free to switch off and start over again. The update, connected to i`Tunes should take no longer than an hour. Oops, depends on what internet speed you have. But even with 1 M bit / sec it should work that fast.
Restart the computer, connect the iPhone to the computer and choose look for an update. When iTunes, can't update, it could ask you if it is ok, to first put back the old information.

Please contact your Internet Service Provider if you are getting your provisioned speed according to your package. They need to run speed test for your account.

disconnecting from internet is a bad configuration of the Modem Router.Also bad signal from your internet provider.check all wiring,and telefone line that holds the ADSL signal.rusted telephone line connections do that trouble.

Turn off the computer before you begin making connections. Make sure the cable modem is up and running with your service before you attempt to make the computer connection.

2 Connect the coaxial cable from the wall outlet into the back of the cable modem where it is marked "Cable" and has the male coaxial connection. Use an extension coaxial cable if necessary to reach the modem.

3 Connect the CAT 5 networking cable from the cable modem where it is marked "PC" (or something similar) and connect the other end into the back of your computer where the networking card is. These connections are RJ-45 connections that look like oversized telephone jacks. If you also have telephone service through your cable provider, you will want to connect the telephone line into the port on the back of the cable modem marked "Telephone."

4 Connect the power cord into the back of the cable modem and plug it into a power strip with power surge protection. The modem should power on by itself once it is plugged in. It will cycle through a power on self test and then make the connection to your cable Internet provider. Once the lights indicating power and cable are green, you are ready for Step 5. It could take several minutes for the modem to connect to your service provider.

5 Turn on the computer and test out your Internet connection. Should your computer still have a problem connecting to the web you may need to reset your cable modem. You will find a small recessed button the size of the head of a ballpoint pen either on the back or front of the modem. This button will be marked "Reset." Pushing it once will allow the modem to reboot and reset all its connections. Turn off the computer before resetting the modem to allow the computer to flush all the networking connections out of its memory as well.

If the power goes out and your connection is not restored when it comes back on, always reboot the devices in this order: cable modem first, computer second. Keep the cable modem where it can get proper ventilation. Call your cable Internet provider if you get frequent interruptions to your cable Internet service and rebooting the modem does not solve the problem.

right click on the icon under programs and select send to desktop(creat shotcut)

Boy, do a system restore.
1 start .
then click Help and Support
.

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2 Under Pick a Task
, click Undo changes to your computer with System Restore
.

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3 Select Restore my computer to an earlier time
, then click Next >
.

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4 Under, 1. On this calendar, click a bold date, select a date before problems were observed with the computer.
Dates in bold indicate a restore point is available for that date.

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5 Under, 2. On this list, click a restore point, click to choose a restore time from the list.

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6 Click Next >
.

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7 Verify that the desired restore point is listed, then click Next >
.

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8 After the computer restarts, the Restoration Complete page of the System Restore window appears. Click OK
.
If the problem still occurs, try restoring the computer to an earlier restore point.

In windows vista..everything would remain the same. instead.
step 1 & step 2 will change

click start> and start typing system restore (in the start search box) and then click on system restore.
everything else from step 3 will remain the same. and you wont see any calender or bold dates, but you will only get the restore points. also click on show me restore points older than 5 days. to get more restore points. then select the restore point and then continue.

if this doesnot work. then post the problem again with the ip address of your computer. to get the ip address call your ISP.