Advice 1: Why the modem restarts

Each user uses a dial-up connection to access the Internet, sooner or later will face such a problem as the spontaneous rebooting of the modem. This behavior can be caused by a number of reasons.
Why the modem restarts
Most likely, the cause of spontaneous reboots is the increased temperature of the modem. Take the modem in hand and check whether strongly it is heated. Try during work to send to the modem the fan, or put it in a cool place, for example on the window sill.A second possible factor is the lack of voltage. Check the power supply of the modem for damage, check its technical characteristics. Perhaps his power is not enough to supply modem power.A third reason for spontaneous reboot may be outdated modem firmware. Check for current software for your modem on the official website of the manufacturer. If you have an older version installed, please update it.Problems on lines of communication can also affect the modem is not the best way. Line faults can cause conflicts on your modem with the equipment of the provider, with the result that it is possible to observe a spontaneous reboot of the device.The fault of the hardware of the modem may also be the cause of these reboots. Try connecting it to another computer and check. Malicious software (viruses) can also cause a spontaneous reboot of the modem. Check your computer for viruses.It should be noted that an unsuccessful firmware update may cause malfunction of the modem. Before you perform this operation, carefully read the documentation of the modem, and better contact the service center.If the above tips do not help, you should contact the experts.

Advice 2: How to check why the computer continuously restarts

The computer has become not only a work tool but also a means of communication, and a favorite pastime for many owners. It is clear that incorrect operation of this device leads to material losses, and spoiled the mood.
How to check why the computer continuously restarts

The computer restarts when you enable

Usually restart immediately after switching is caused by problems with the power supply - maybe it goes down or its capacity is not enough to power all the components. In the technical documentation and on manufacturers ' websites indicated how much power the device used in normal operation and at peak loads. Test the computer with a new power supply, nominal power supply which is enough to power all components of the system unit.

When you turn on the computer to load the operating system launches the POST – firmware self-test, which evaluates the status of the devices in the system unit. If the test went OK, the BIOS reports this short single beep and give the command to boot the operating system. Of incorrect operation of any of the devices reported a combination of long and short signals. If your computer reboots immediately after you turn, try to use a table of decoding signals POST to your motherboard. This way you will be able to determine the faulty device.

If "console beeps indicate a RAM, on the website of the manufacturer of the motherboard check to see if your "motherboard" of the device. If so, carefully remove the RAM modules from the slots and clean the contacts with an ordinary eraser. Insert the modules one by one and test the computer to determine the faulty cost of RAM, if the problem in it. If the module is one, insert it alternately in different slots. Be careful not to damage the PCB. If possible, test the computer with known good memory.

In the same way, check the video card, if POST indicates a malfunction. Clean the contacts of your card and ask at the time of the other charge from friends, if this operation did not help.

Another source of trouble may be a dead battery which powers the ROM chip on the motherboard. Replace it and test the computer.

The computer restarts during work

A very common cause of the reboots, except for the faulty power supply is overheating components. Check the temperature of the CPU, North and South bridge, graphics card with special software (AIDA, EVEREST) or tactile, immediately after shutdown. Unplug the computer from the network, remove the side panel of the system unit and a well blow out dust with a vacuum cleaner on blowing.

Probably dried up thermal grease on the CPU heatsink. If you are confident, remove the radiator, clean it with alcohol sole and the surface of the processor chip from the old paste. Then apply to cleaned the radiator a very small amount (literally a match head) of fresh thermal paste and carefully smear it over the surface evenly. When installing radiator, ensure that it stood up straight, without bias, otherwise the CPU may malfunction due to non-uniform overheating. If you doubt that do it right, better to call service.

The cause of the reboots may be software or improperly installed driver. Right-click the mouse on the icon "My computer", select "Properties", go to the Advanced tab and click Settings under "startup and recovery". Under "system Failure" uncheck "automatically restart". Now, in the event of a critical situation, the computer will not reboot and will go into blue screen of death displaying the error message. On the Microsoft support website for the error code to find its cause.

Advice 3: Why computer freezes and reboots

The most common causes of "freezing" and restarting the computer are infected by viral programs, glitches in the operating system or failure of memory.
Why computer freezes and reboots

The reason – the virus

First, you need to scan your computer for viruses. Use the installed anti-virus program and scan whole computer. In that case, if you doubt the effectiveness of the installed antivirus, it will not hurt to reinstall and use a more reliable option. Rating antivirus software is compiled annually, covering almost all noteworthy products and published on the Internet. In that case, if the version of virus infection is not confirmed, but the computer still freezes and randomly reboots, it is necessary to conduct consistent review of the hardware part.

Cause – faulty hardware

Begin testing the hardware with a study of the status RAM. For this free memory recorded in the item "Physical memory" task Manager" should not be less than 20% of the total volume. In that case, if free memory is less then you should increase the amount of RAM in the computer or constantly to ensure that unnecessary applications have been disabled. Forced shutdown of processes via "task Manager".

The reason – a failure in the operating system

If there is no shortage of RAM, and viruses the effect of "freezing" and restarting can be caused by a failure in the operating system. The situation can be corrected only reinstalling or restoring. Prior to the reinstall or repair make sure that all information from the disk was stored either on external drives or on drive D.

In addition to these, the most frequent causes of "freezing" and rebooting to cause such effects can a faulty power supply, defects of components of the system unit, the motherboard damage. Overheating of CPU or video card – the scourge of modern computers and especially laptops. The desire of producers to compactness, leads to a sensitivity of machines to external temperatures. Therefore, if your computer is faulty in the summer, it is likely that this is a consequence of overheating. For temperature monitoring you can use special software applications available on the Internet. These programs allow you to track the temperature changes in the main components of a computer. Thus it is possible to identify what stress the hardware the same as hang and restart.

It is very difficult to determine what exactly has failed in these sites. So often they change to a new one. The best way out is to appeal to the service center to diagnose the fault and further repairs on the computer.
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