Pc start dirctly even i shut it down properly

I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure.They have repair manuals at a very less cost.
2006 Nissan Altima

dear sir , acutully your dell laptop is in hibernation mode, and is not coming back

you can try following:

1. remove batter plug directly and try to switch it on without battry.

or

2.press power switch for 13 sec continusly and once it shuts down , switch on it again

this will definatly help you

thanks

sir you can download the pc suit in www.samsung.com in this website search your model and then download the pcsuit..............

its either your battery that needs to be replaced or your charger it's not working

Sir,
There is a way which can actually help. You can open screws of your laptop from down by removing the battery. then search for the jumper in the motherboad remove it and screw it up put in the battery and start there will be the messege bios reseted.
the passward would be removed and now if you want to put in the jumper you can do that or if not its all up to you.

Explain what you mean when you say 'when i open the pc from main switch'.
Also, something you should try is updating the CMOS, or in other words flashing the BIOS firmware. Go to your motherboards manufacturers website and see if there are any BIOS updates for it.

Go back into BIOS and reset the time and date even if it is correct. Change it to the wrong time then change it back. See if that clears the error. While you are in BIOS check around on each of the menus see if anything says bypass on start up...or something to that affect. Finally, are you sure the battery is not in upside down? That would cause you some funky problems also.

Remove the RCT battery and wait for 5 minutes. Replace it and and reassemble the computer. it should be cleared

Boost your car with jumper cables and let the car idle or drive around for about 20 minutes for the alternather charge the batter on its own .if the car shuts off after you started it might be your alternather is no good . the reason why ur alternather might not be working is because the batter all it does is give enough power for the starter to crank the engine as soon as the engine starts running it gets all its juice from the alternather and it charges the batter as well. but some times when the alternather works and the batter is dead meaning all the cells inside the batter are dead it will never take the charge from the alternather. so you would have to change the batter.

if you would like to know how you can you test both parts useing a volt-a-meter... just ask...

p.s. I think its ur batter if you never changed it. so get that changed for the winter so you wont have any more starting problems during cold wheaters

This sounds like a short of some kind from the motherboard touching either the body or some other peice of hardware, or you have a broken soldered joint on the board causing the problem. I would take to a qualified repairer.