When I press shutdown the laptop restart

[ohail]

I have dell vostro 3300 brand new. when I press shutdown the laptop restart, I could not fix
I think mp laptop is not normal.I tried to install another operating system
I changed OS to XP but I got the same problem...

 

[learninmypc]

I have dell vostro 3300 brand new. when I press shutdown the laptop restart, I could not fix
I think mp laptop is not normal.I tried to install another operating system
I changed OS to XP but I got the same problem...

You might of voided the warranty by putting another OS on it,but you might contact Dell & see what they say.