Consumer Redressal

Dear Sir, I would like to bring to your kind notice regarding the frequent Hard Disk failure of my Toshiba Satellite L640 which was purchased on 06.10.10.The system was partly malfunctioning (RS speaker not working) on purchase itself and found a tendency of frequent Hard Disk failure since 09.12.10.I came across 3 Hard Disk replacements, 1 OS corruption and former speaker issue since purchase. I?m very much bothered about my Satellite L640 and haven?t ever installed a higher graphics oriented game or software as I care electronics being an Engineer. I seriously believe something other is wrong with my laptop ( Technically ) which leads to hard disk failure. The last hard disk replacement was performed on yesterday (25 July 2013) and they gave an additional warranty for 1 year (only for hard disk) as a result of my arguments. And when I demanded for a replacement to get relieved from this, Toshiba technical officers strongly says its impossible. I even argued with head office ( Gurgaon