Often BSOD, computer crashing

Hello,
my computer have been crashing and showing up BSOD very lately and may I ask if it could be due to RAM slots problem?

My computer is Asus UL20A Series,
Genuine Intel(R) CPU U2300 @1.2GHz 1.2GHz
2GB Ram
64-bit operating system
Mobile Intel® GS45 Express Chipset


If anymore details of my com specs needs to be provided, pls tell me so.

The reason why I think it could be due to a faulty RAM slot is because long time ago ( probably a year ago ) I found that my 2GB RAM was too slow for me, so I went to purchase another 2GB Ram ( Kingston KVR800D2S6/2G ) and installed into the computer. Nothing went wrong until recently, my computer started crashing very regularly and when I took out the external 2GB RAM that I bought, everything works fine and doesn't crash that often anymore. But still, my computer is still crashing very regularly even when the RAM is default.

Could it be a faulty RAM slot or a spoilt graphics card?
Please I need help as soon as possible as I have a very important project to rush out but yet each time the com crashes I couldn't continue on with my work.



P.S : My computer crashes very often especially when I play the game 'League of Legends', and don't crash as much when I use to surf the net. I have already set all the game graphics to the lowest.

Go here:
http://www.techspot.com/vb/topic51365.html
Follow the instructions and test your memory and hard drive for errors. You will also learn how to post any minidumps

how old is this laptop? What OS? did it come with a 64bit OS or did you upgrade?