Launa sajha basi sathi ho laptop crash bhayera last veja banai sakyo..............dherai crash bhayo bhanera format pani gari sake..........still have same problem...............bharkhar battery change garya thye........tyehai bhayera ta hoina hola hai???? 2 barsa purano laptop hoo...........DELL studio 1558 model......don't have idea how to fix it......... 

 try to take picture of bluescreen with a camera and post the error code here.

 ok next time it crashes I will post this............thanks.......

The screen after crash showed like this.........

like this

2nd one

 try this link

http://helpdeskgeek.com/how-to/how-to-fix-stop0x000000f4-blue-screen-error-in-windows/

 Yup looks like sth went Rambo on your bios, reset the cmos.take the battery out and reboot.

Ultimate boot CD,
autorun it
run the diagnostic tests on all PC components.
if something is wrong, it'll show you the message with red font colors

 40 rupiya pardo raicha GIORDANO bro.........fix garnu lai taa......free ma kehi garna mildaina.............k garnu free ma paye samma kina paisa tirnu bhanya ni..............ani aafu le try garya ho ke yeso google garera malai help garya matrai hoo??? kine pachi bhayena bhane k garni nii??

MASPAYNE bro....Cmos bhanya computer ho ke k hoo?? battery jhickera restart gare.........kehi crash bha bhaye cha bhanya.......2/3 din dekhi ta jhan achakli bha cha...... 

 bittertruth bro........where can I get ultimate boot CD? is this same which I had used to format the computer???

After I read two comments up about what you wrote, I think UBCD is not for you. :D You should have someone PRO nearby to help you out. This is more technical than you thought.
Please don't mind.

 aafu le thulu battry nikalera restart gareko ki bhitra ko? there is a nickel sized battery in the motherbord that you have to take it and put back on. youtube ma ttaanna vidoe chha hola cmos rese ko.

 kaha lekheko cha 40$ parcha vanera. malai ramro sanga samjauna aaundaina tara CMOS battery jhika ani tyo battery ko side ma 3 pin jumper huncha 1& 2 being the default. tyo jumper jhikera aba 2 and 3 ma hala and restart the machine. 1 min pachi turn off gara. and put the jumper back to the default location that is 1 and 2. 

timile bujeu ki bujenau thaha vayena.... tara bujeko vaye try gara and it will work.

Sometime too much stuff in the computer makes less memory I'll explain in Nepali yo dherai computerma memory occupy bhayo bhane pani kahele kahey testai Huncha best bet is like tyo sabai computer ko file haru external hard drive ma rakhio ani format handepachey thick Huncha obviously ek duo choti reboot take garnai parcha hope it helps best of luck