How to fix error 720 modem

The old joke, once invented for KVN TVs - “bought, turned on, doesn’t work” - is now increasingly remembered by owners of wireless modems, sold in abundance by cellular operators, promising incredible speeds, reliable communication even in the country or on a hike, and others benefits characteristic of civilized places.

However, in practice, these devices often behave capriciously, not wanting to send their owner to the World Wide Web. In this case, various errors may be generated. The subject of this article will be instructions on how to resolve error 720 when connecting to the Internet.

What does it mean

When registering online, you receive the message “Error 720”. Such diagnostics can be associated with protocol failures, and it indicates, rather, not that the modem is malfunctioning, but rather that the operating system that is currently installed on your computer has its own “holes.”

However, this is not a reason to rush into all seriousness and try to reinstall Windows. This option is reserved for the most difficult cases: when the entire system is installed, in the language of system administrators, “crookedly.” This is often called “failed assembly”. By the way, there is a completely fair and reasonable warning that you do not change the system.

Important! Look at how many logical drives your hard drive is divided into. If for several, then most likely, by getting rid of the old system, you will not lose valuable data, and then only if you saved it strictly not on the system drive.

If you follow the beaten path, saving files in the “My Documents”, “My Pictures”, etc. folders, then it will not be safe for you to reinstall the system. If you have another logical drive, move the data there first.

If your entire hard drive is designated by a single letter “C,” copy everything important to any other medium: flash drive, portable hard drive, CD or DVD, mobile phone.

But if you decide to correct the protocols without reinstalling Windows, then you can cope without these measures.

Attention! To be sure, you can create an image of drive “C”, so that if something happens, instead of reinstalling the system, you can simply “rise” from this image.

Possible reasons

As mentioned above, the most common cause of error 720 is incorrect PPP (Point-to-Point Protocol) parameters. Sometimes incorrect TCP/IP contributes. By the way, it is not always possible to replace it without getting rid of the driver for the “WAN Miniport” and reinstalling it.

In order to achieve an Internet connection, you have to reinstall this driver, and this is a separate science, since simply removing it and installing it again is possible only with the help of a series of knowledge.

Video: Error 720. No PPP management protocols configured

Solving the problem

The first thing you need to do is not be afraid to make changes yourself. In this case, you have no way to retreat. Even if nothing comes of your idea, a computer wizard will be able to help you out, to whom you will tell that “everything is so.” But if you can restore your Internet connection yourself, you will simply save on paying for the service. Let's start with the simplest thing.

If you have exhausted all the advice on the website of the cellular operator that released the modem, and nothing has worked for you, then take the initiative into your own hands.

Reinstalling the driver

Are you experiencing error 720 when connecting to the Beeline Internet? Each such device requires driver installation when connected to a computer. You can either download it from the appropriate resource, or bring the laptop to the service center, where they will install it for you. The corresponding programs may already be on the modem.

Photo: this is how error 720 can be presented

In some cases, the driver may refuse to work outright, and not immediately, but after several starts. And then you will have to install it again. The most important thing is not to make a mistake and download the driver specifically for your system. Not only the version must match, but also the bit depth – 64 or 32.

What other problems do owners of Beeline modems face? With the fact that the computer simply “does not see” them.

Then you will have to do the following:

After these simple manipulations, the system should allow you to reinstall drivers manually. All that remains is to find the folder where they are contained and select the appropriate one. It is possible that you will have to do an overload. After it, the Internet connection should work as required.

Configuring PPP protocols

Despite the fact that as a diagnostic, the computer often gives an error, referring to the absence or improper state of PPP, we are talking about lower-level protocols, which include IP protocols or TCP/IP. Therefore, in many instructions you will immediately find a transition to working with these protocols.

As for PPP, this is considered a secure communication channel, a variation of which can be PPTP - the so-called “tunnel” communication protocol. But let’s leave all these differences in names and move on to specific actions.

Some of the above steps may help.

Resetting the IP protocol and cache

You will have to work with the Windows command line:

1. press Win+R or through the “Start” menu + “Programs” + “Accessories” + “Command Prompt”. It must open up;
2. set the command: netsh int ip reset reset log.txt;
3. set the command: netsh winsock reset;
4. if necessary, create a new VPN connection.

Attention! After this, some programs that receive data from the Internet may not work. This behavior of the computer is normal; its operation can be restored by reinstalling these programs, and as a result, it should not scare you.

Restoring Winsock Configuration

If the Winsock specification configuration is damaged, then you need to reset this specification, that is, repeat the 3rd point from the previous list.

To do this we issue the command:

netsh winsock reset.

At the same time, we naturally return to the original system settings, that is, we lose some of the parameters that were written into the specifications during the time when we managed to install anti-virus programs, various agents and other products that work directly with the network on the computer.

If you find that one of them has stopped working, then reinstalling the product will help you painlessly start working with it as before. But at the same time, you will be able to communicate via a modem, eliminating error 720. If this operation does not help, then you can advise “deleting” the erroneous sections in the registry, as well as reinstalling TCP/IP.

Removing invalid registry keys

If damaged sections are found in the registry, this can also negatively affect the operation of the Internet connection. The registry is kind of the heart of Windows, so you need to handle it carefully.

Attention! We don’t touch anything else in the registry editor!

TCP/IP protocol

After such major changes, the protocols must be reinstalled. For this:

1. right-click on the network connection and select “Properties”;
2. look for the “Install” command;
3. select the “Protocol” item with the “Add” button;
4. select installation “From disk”;
5. in the line we enter: C:\Windows\inf and confirm;
6. when the list of protocols appears, look for TCP/IP in it and “push”.

As a result, TCP/IP will be installed. But if this is not enough for the Beeline, Megafon or MTS modem to work with your computer, then you will have to intervene in the WAN Miniport driver.

WAN miniport

If you reinstall this capricious driver, then success will most likely be ensured. However, when carrying out such an operation, you may encounter pitfalls. If there may be no problems with removal, then installing this control program again is not easy.

The problem is that Windows offers a list of drivers from which you need to choose, and Miniport is not in it WAN:

After these manipulations with control flags, the system will not “know” which drivers are worth installing and which are not. This will allow you to easily reinstall the WAN Miniport.

After this, you can install TCP/IP again.

Error when connecting MTS and Beeline modem

When connecting MTS and Beeline modems, various malfunctions may appear; in the article we analyzed a difficult case - error 720. It does not occur so often, but there is no need to be afraid of it, since the ways to overcome it are described above.

Diagnostics

Using similar methods, you can diagnose faults when the computer displays other errors when trying to connect via a modem from any of the cellular operators. All these problems, including the drop in speed, can be solved.

And in conclusion, we will add that you can often encounter a hardware problem that arises simply because your neighbor has an overly powerful Wi-Fi router that clogs the 3G/4G signal of the cellular operator.

Also, the reception may be unsatisfactory if:

• the cell is located far away;
• you are in the basement of a reinforced concrete house.

Error 720 windows can be cured by running the utility FixIt50199 from Microsoft. Our workshop provides services to eliminate error 720 in the Windows XP, Vista and 7 operating systems, and also occurs when using modems from Beeline, Megafon, MTS Connect

Second way

This method of how to solve 720 connection error works. We checked it on an unsuccessful build of Windows XP - error 720 pops up immediately after installation. It is detected when initiating a connection via the PPPoE protocol, if authorization is successful.

1. 1 Delete the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock and also HKEY_LOCAL_MACHINE\ System\CurrentControlSet\Services\Winsock2
2. 2 Reboot the computer
3. 3 Replace the line in the file %windir%\inf\nettcpip.inf: ;TCPIP has properties to display Characteristics=0xA0;NCF_HAS_UI|NCF_NOT_USER_REMOVABLE with: ;TCPIP has properties to display Characteristics=0?80;NCF_HAS_UI
4. 4 Go to “Network Connections”, then the property of your connection
5. 5 Place the TCP/IP entry over the old one (the “Install” button, select the “Protocol” item, click “Have from disk”, select the file %windir%\inf\nettcpip.inf), reboot
6. 6 Remove the TCP/IP entry (the “Delete” button should become active), restart the computer
7. 7 Reassign TCP/IP (repeat step five)

Third cure

This is a radical solution to such a problem as error 720 when connecting to the Internet. Gradually execute the following commands:

netsh int ip reset resetlog.txt netsh winsock reset

Afterwards, we reboot the machine and establish a local connection, since the execution of these directives leads to overwriting the system registry settings that are used by the TCP/IP stack, which is equivalent to deleting and reinstalling it. P.S. Reset the VPN connection if necessary.

Warning! Implementation of the command netsh winsock reset may negatively affect programs that access the Internet or monitor data there: antivirus programs, proxies and firewalls. If one of the specified applications does not work correctly after using the medicine in question, rearrange the program to restore its functionality.

It happens that yesterday you used the Internet normally, but today you cannot access the network. It would seem that everything is as usual, the login and password have been verified, the computer is being registered, but then a window pops up in which the message “720 error” is displayed. This indicates that due to a protocol failure, most users here begin to literally panic. But this is the last thing you need to do, because this “disease” can be easily and simply “treated”, and now we will see exactly how. You will need about an hour of free time, patience and the desire to fix everything, as well as computer skills at a beginner level.

What should you do first?

The most important thing is to understand that this error is relatively rare. This is especially true when it comes to correct However, if you are unlucky, then first try such basic steps as turning the computer on and off, rebooting the modem, in the end, you can call the support hotline (free) and leave your request there , having previously explained what the problem is. But one thing is for sure: the problem is probably that your operating system has a “hole” somewhere, due to which the connection is distorted, and you, in fact, see the following inscription: “Code 720, connection error.” But there is no need to despair, now we will figure out how to solve it without the help of professionals, which will help save us some money. For this you will need a little patience.

What causes the error?

In all cases, this disease occurs due to incorrect parameters of the PPP protocol of your Windows operating system. It is worth noting that it does not matter which OS you use, be it Vista, 7 or even Win8. In 100% of cases, the culprit is PPTP protocols, which are either incorrectly configured or absent altogether, which, by the way, also occurs. Let us immediately note that without certain knowledge it is quite difficult to fix the problem, so it is strongly recommended to read this article to the very end. The easiest way to solve the problem is to reinstall the operating system, which will most likely help. But the fact is that even on the new platform you may encounter error 720 when connecting to the Internet, so we’ll leave the reinstallation until the very end.

Code 720 appears: connection error, how to solve the problem?

Even a beginner can handle this method. Here practically nothing is required from you. You need to reset the settings to those that were in the factory. To do this, click “Start”, then “Run” and type After that, enter the following phrase: netsh int ip reset resetlog.txt. And we need to enter another similar phrase: netsh winsock. The next step is to reboot the personal computer. Try to connect to the Internet. Most likely, the error will disappear, but there is a high probability that most programs that require an Internet connection will stop working. You will need to reinstall them. The thing is that the commands you enter rewrite part of the registry. Now let's move on.

Reinstalling network card drivers

This is a little more complicated, so read carefully, repeat - and everything will work out. Again, we'll need to rewrite the registry a bit, only this time in a different way. Go to “Start”, “Run”, enter the command regedit. Here we completely delete sections that are somehow related to wincock. We need to erase the entries: HKEY_LOCAL...wincock and HKEY_LOCAL...wincock 2. Reboot the computer and try to connect to the network. Please note: everything that you deleted will be automatically restored by the system, so you don’t have to worry again. If everything worked out, then you will no longer see the inscription: “Error 720”. Windows 7, 8 may require changing the nettcpip.inf file.

“Error 720”: MTS modem and Beeline

As practice shows, quite often such a problem occurs on the above devices. It should be noted that this is possible in exactly the same way as for a regular modem. Therefore, before contacting support, try the above steps. Finally, go to the Windows/inf folder. There, find the file nettcpip. Go into it and find the line TCPIP has properties and after the equal sign write 0x80. Save the changes and close the file; you can also check the “read only” box in the settings. After rebooting, you can delete and then re-establish the connection. To do this, go to “Control Panel”, “Network Connections” and select the “Add and Install” protocol. Use a previously edited document as a disk. We reboot the PC, “Error 720” of the “Megafon” modem should be resolved.

We carry out diagnostics

In some cases, before deleting or reinstalling something, it is necessary to perform diagnostics that will accurately show where exactly the problem is hidden. Go to “Start”, then “Run”, and then enter Command in the field. After this you need to write Netdiag. As a result, you can observe results across multiple network components. This will also necessarily include Winsock. To get the data we need, you need to write the following: /v: Netdiag/test:winsock /v. If you did not receive any errors while executing the action, then everything is fine. If problems arise, you need to restore the damaged configuration. We have already talked about how to do this. As you can see, the “720 error” of PPPOE connection can be solved, but it requires some effort. There is a 90% chance that your problem will be solved, but it is quite possible that you will have to reinstall the operating system.

What else should you pay attention to?

As noted above, there is a chance that none of the above will help. In this case, we can recommend trying to remove and install the TCP/IP protocol. It is likely that this will correct the situation. In any case, reinstalling the operating system should only be done after all options have been tried and nothing has helped. But again, using a Windows license reduces the risk of Error 720 to a minimum. Moreover, you can be sure that everything will work. The same applies to the modem. If it was set up by a professional, and the OS is licensed, then with 100% probability you will not receive such errors. Of course, at any time you can look at the log file, which will tell you what exactly the problem is; you can upload it to the forum where experts gather, and there they will certainly find the optimal solution. The name of the file is PPP.log, it is stored in %systemroot%/tracing.

Conclusion

Perhaps this article has said everything that can help you. The only thing we haven't mentioned yet is a reliable antivirus program. The fact is that any malware that uses the Internet connection can disrupt it. Therefore, you can try everything, but nothing will help other than reinstalling the operating system or simply removing the virus. In any case, before “demolishing” Windows, try everything recommended in this article; if nothing helps, then contact support or call a specialist at home. The latter will solve all your problems related to incorrect protocols that do not allow you to access the network. It will cost depending on the complexity of the problem, as a rule, 300-400 rubles. If you cope with the problem yourself, then these funds can rightfully be considered savings. Moreover, if the error occurs again, you will already know what to do.

If you are using a Windows computer to connect to a remote computer using a local network or the Internet, sooner or later you may encounter error 720. The error description will indicate that the connection cannot be established and that network settings need to be changed. We will describe in this article what causes such an error to appear and how to get rid of this problem.

Why does error 720 occur?

To connect to remote computers using a local network or via the Internet, special PPP control protocols are used. If their settings are incorrect or the protocols have been changed, attempts to establish a connection will be interrupted and the user will see error 720.

Most often, this problem appears after uninstalling Avast antivirus software! During the removal process, the settings of those same protocols are affected and, to ensure system security, remote access is completely blocked.

How to solve error 720 problem

• Press the Win and R keys on your keyboard at the same time.
• Enter and confirm the regedit command.
• In the system registry editing window, divided into two columns, find the following entries and delete them using the mouse and the right-click context menu:
• HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock
• HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock2
• Restart the PC so that the system creates the deleted partitions again, assigning them standard values.
• After opening all connections from the Windows Control Panel, select the local area connection and open its properties using the context menu.
• In the small system window, find the components section and select Internet Protocol Version 4 (TCP/IPv4).
• Click the Install button.
• Select the network component type Protocol and click Add.
• Select Have from disk.
• Specify the path C:\Windows\inf\nettcpip.inf and confirm the entry.
• In the list of suggested protocols, also find Internet Protocol Version 4 (TCP/IPv4) and click OK.
• Reboot the system and try connecting again.