u all so many problems lar
juz reprogram d whole PC lar!
change the RAM into other RAM slot
sumtimes d RAM slot itself problematic
if using 2 try to use one at a time n run memtest86+ for errors
if no den continue with 2 ram stick
if its graphic driver problem try to use others graphic card
pinjam2 wif ur fren
if still same problem occur
i think its d mobo lar nth else
but blue screen normally bcos graphic driver prob or ram prob