Original title: Internet ConnectionI have a network with four computers all connected to the modem through cables. One of the computers with Windows XP professinal has a problem: the internet connection wizard stopped making connection to the Internet and shows a message error 797. The modem shows the computer is connected to it and the green light is on. could please help

Hi,On my research I have found two of your post where Gerry C J Cornell and LemP have replied to your post. Please answer their questions. This may help us in assisting you better. For now let’s try the below steps and check.Step 1: If the issue has started recently then, try performing system restore and check.Refer: http://support.microsoft.com/kb/306084Step 2: Optimize modem settings:a. Click Start, and then click Control Panel . b. Click Printers and Other Hardware. c. Click Phone and Modem Options. d. On the Dialing Rules tab, select the location that is being used, and then clickEdit. e. Verify that the correct country is selected in the Country/regionbox, and then click OK.Note If the wrong country is selected, problems may occur because the modem adapts to each country's telephone system. These systems have various dial tones, line speeds, and so on.f. Click the Modems tab. g. Select the modem that you want to optimize, and then click Properties.Note If no modem is detected on the Modems tab, refer the customer to the computer manufacturer.h. Click the Modem tab. i. Set Maximum Port Speed to 57600. j. Click the Advanced tab. k. Verify that on the Country/Region drop down menu, the country that the caller is located in is selected. Note If the wrong country is selected, it can cause several problems because each modem must adapt to the particularities of each country’s telephone system. These include differences in dial tone, line speed, and so on. l. Click Change Default Preferences , In General Tab under Call preferences set Cancel the call if not connected within field to 255 seconds.m. Click OK . n. Click OK two times, and then close Control Panel. Step 3: Run modem diagnostics. For additional information about how to run modem diagnostics, click the following article number to view the article in the Microsoft Knowledge Base:a. Exit all programs, and then close all open windows. b. Click Start, and then click Control Panel.c. Click Printers and Other Hardware. d. Click Phones and Modem Options. e. Click the Modems tab. f. Select the modem on which you want to run the diagnostics. If you do not know what modem to select, contact the OEM.g. Click Properties. h. Click the Modem tab. i. Set the Maximum Port Speed to 57600. j. Click the Diagnostic tab. k. Click Query Modem. l. If the modem responds and it is functioning, the system displays the modem information. If the message "No Hardware ID Found" is displayed, or if you receive an error message, contact the manufacturer of your computer for help with troubleshooting the modem errors. Step 4: Remove the modem, and then restart the computer. When the computer restarts, Windows detects the modem and attempts to install the correct driver for it. To do this, follow these steps:a. Log on to the computer as administrator or as a member of the Administrators group.b. Click Start and then click Control Panel.c. Double-click Phone and Modem Options. d. Click the Modems tab. e. In the The following modems are installed list, click the modem that you want to remove, and then click Remove.f. Click Yes in response to the "Are you sure you want to remove the selected modem(s) from your system?" message.g. Restart the computer. h. The Found New Hardware Wizard starts. Follow the instructions in the wizard to reinstall the modem.Thanks and Regards Umesh P - Microsoft Support. Visit our Microsoft Answers Feedback Forum and let us know what you think. [If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]