Sony — CRASH DOWN (DEFECTIVE RAM )

Address:

Ghaziabad, Uttar Pradesh

hello,
I,Apurva Aggarwal,purchased a sony vaio laptop from Pioneer computers,ghaziabad.

Within 2 months of purchase the system began to hang.Then to add to the problem it crashed showing a blue screen displaying a message of DUMPING PHYSICAL MEMORY.
I quickly showed the laptop to the sony center of ghziabad,where the technician said it is an internal problem & need repair.
I was charged Rs400, for the same ,which I am NOT SUPPOSED to give sine it is in th warranty period ,still to avoid risk i agreed.
NOW the same problem is occurring daily. I have spent a huge sum of money by now
.I want no less than REPLACEMENT OF THE LAPTOP BY A NEW ONE.

Whoseover is the concerned authority plz look into the matter as soon as possible as my entire work is done on the system.
Revert back to the immediate.
DETAILS:
Date of purchase:10-july-2011
Invoice no-394
LAPTOP SONY VPCEH15EN/B IN5
serial no-7000704