Hi Gambhir,
Thank you for visiting Sony Community!
Are you trying to perform a clean install of Windows 8.1? Is Windows 8.1 disc a DVD, DVD/RW, etc.? You may follow these steps to isolate the issue:
- Power cycle - Remove the battery and all peripherals -> press and hold the power button for 5 seconds OR, if the battery is not removable, remove all peripherals -> look for a battery off button on the bottom of the laptop -> push the button for 5 seconds
- Clean the disc using a clean cloth. Make sure the disc is free from dust/dirt.
- Open the files within Windows Explorer.
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Regards,
Vincent
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