Computer starts by itself - Intel Computers & Internet

check for a shorting wire for the starter relay or faulty starter relay
if you have a remote starter system check it out as well
run fault codes

Seems to be a faulty door latch...it wants to start but the computer thinks the door is still open and wont allowing it to continue, thus turning off. Try playing with the door latch before opening it up and looking within the latch.

Some computers have an option in the BIOS or System Setup Menu to turn the laptop on at a particular time. It's a good feature for people who turn their laptops off at night because the first thing a computer does when you turn it on is to load all the startup software, then begin downloading and installing any updates it might have missed while it was turn off or start running a virus update or scan. That's why computer seem so slow when you first turn them on for about the first 10 to 20 minutes or so. So if I turn my computer off at night and I know my day gets started at 8:00am every morning, then I can set my computer to turn itself on every morning at 7:00am by itself. That way when I go to use it, it's good and fast.

It may be that the computer is overheating. Are you using the computer on a bed or other soft surface that might be preventing the computer from cooling properly?

The small battery inside of a desktop computer is what's called the CMOS battery. That allows the computer to store basic information within itself so that even when unplugged, it's able to start itself up if it isn't plugged back in within a certain time. If it was removed, put it back in. Otherwise, if the computer starts up normally, and everything else works fine except for the internet connection on it, it's possible that your network adapter on your computer could be faulty too, if I read the question correctly.

there is something wrong with the computer
it is junk sorry

It is either the battery of the motherboard is out or the processor is heating up so much that it would restart the computer to protect itself.

Hello

To start with, you should check all your hardware. A loose connection somewhere or a faulty piece of hardware could be the reason, the computer keeps rebooting itself. In case your RAM stick is not fitted properly, or is corrupt, the computer displays an error message on the screen and keeps rebooting itself. The same problem occurs with a hard disk. You can use 'Memtest86' to run a hard drive check.

You may at times come across an error message on your screen, like a system failure error, before rebooting by itself. There is a particular solution to this type of problem. You should first go to the My Computer icon and right click on it. Select properties, and a window will appear on your screen. Click Advanced tab → Start Up and Recovery → Settings. After clicking the settings option, you will have to uncheck the box next to Automatically Restart. Click OK twice. This will prevent the computer from rebooting itself and you can redress the issue.

A different way to tackle the problem of 'computer keeps rebooting itself', would be to restart your computer in the Safe Mode. Allow the computer to boot fully and let your windows operating system load fully. Now, if your computer keeps rebooting itself even in the safe mode, there is a problem either with the operating system or hardware. And if your computer is not rebooting itself in safe mode, the problem is related to certain software.

Over heating is another reason why your computer keeps rebooting itself. Not many people pay attention to this aspect though. The fan responsible for keeping the CPU cool, may be malfunctioning or there could be dirt settled between the fan and CPU. Any one of these could be the reason for your problem. Either clean the fan area, or replace it if necessary. Try providing proper ventilation for your CPU, so that it stays as cool as possible.

You computer could reboot on it's own if you have installed improper drivers. Right click on the 'My Computer' icon, and click on 'Properties' from the menu list which appears. A new window will open. Select the 'Hardware' tab, and click on 'Device Manager'. A list will be displayed on the screen in which you will have to check all categories. Is you see any red or yellow warning icons, make sure you update that particular driver from the internet.

service your monitor your monitors cadr is problem

Have you looked into System Preferences>energy saver>schedule? Maybe it's set up to start itself. I have my mother's mac set to start up and shut down automatically. Just a thought.