pc shuts down automatically 5 min after start?

Answer 1

It could possibly be a problem with the computer running too hot and parts overheating, that can be a cause.

Answer 2

Could be in your power options. Go to:
Start
Settings
Control Panel
Power Options

If there is nothing there, it's possible it is the fan:
Computer shuts down – reboots at random – won’t start for several minutes …Computer Running Hot
Source: http://www.acronis.com/enterprise/resource/tips-tricks/2004/shutting-down.html

Does your computer repeatedly reboot at random, or randomly shut down and won't start again for several minutes? There might be several reasons why this occurs, but overheating should be your prime suspect.

If you suspect your computer is overheating, the first components to check are the fans. While nearly all systems have a fan on the power supply, many modern systems have a fan on the front of the case to push addition cooling air over the CPU, a fan on the back to push hot air out of the system, and side or top fans to move additional air in and out of the chassis. In addition, many systems have a fan mounted directly on the CPU and either directly on the high-end video card or on the side of the case over the AGP slot where the graphics card is located.

Whether your system has one fan, two or more, check and make sure they are all running. If a fan is turning slowly or not at all, you might be able to salvage it by carefully cleaning the hub or bearings. However the best plan is to replace the fan as soon as possible. If it is the fan on the CPU, turn off your system immediately and replace this fan or bring your system in to an authorized repair depot to replace the fan. (Caution: replacing a fan on a CPU can be tricky. You don't want to damage your processor. If you have any concerns, make sure to have a professional replace of this fan.)

Dirt and dust are the next major cause of overheating. Dust is an excellent insulator and a layer of it on critical components can keep cooling air from reaching the chips. Shut off the machine, open the case and blow out the innards with canned air. And don't forget the fan on your power supply; these can become clogged as well. Be prepared for a small dust storm, even if your computer is only a few months old.
As an alternative, there are small vacuum cleaners that are designed for computer components. These too will clean a lot of dust out of your system, but you still might need canned air to reach the components that the vacuum cannot reach.

Don't try to run your system with the case off. It not only does not improve cooling, it actually hurts it because modern cases are designed to direct airflow where it is needed. For more on running your system with case cover off, please see My Computer Is Running Hot. What Should I Do?. This link can be found by going to the source link I gave above.

Answer 3

this is a virus i had that once it's called something worm anyway u need to format then change some options on your pc because this virus changes options on ur pc telling microsoft to shut it down 5 mins after it starts

Answer 4

Try Start, Control Panel, and the Power Settings. It's possible it is set to go to "Sleep" after 5 min. Adjust it higher.

Answer 5

It might be processor overheating or power supply instability.
Install Speedfan or Everest. Observe the processor temperature and the +3.3V, +5V and +12V for stability. If idle temp is >25 °C above ambient and rising, try reseating your processor heatsink. It might not be fully in contact w/ the processor. Voltages should not fluctuate beyond+/- 5%. If it does, replace your power supply.

Answer 6

Hum????
Could be a Virus. Some have this behavior so update your anti-virus soft and make a full scan.
If not a virus check your system properties and if everything is OK go to your retailer to make an exchange.

Answer 7

and your question is?