Update...
Using Recovery DVD is not possible as it will stop during Windows install. DV Recovery DVD needs to be converted into bootable USB, no changes in BIOS required. Smooth install and than you get clean factory state Tablet. Finally after a week I got it sorted.

After trying to do many things like entering diskpart, clean and format commands the hard disk appears under boot in Bios, and external DVD in both EFI & BIOS but after selecting to install in hard disk, copying installation files there is error required files missing. I'm using Win 8 64 Pro DVD...

No, it's not. Only my external DVD rom, as EFI & BIOS.

Hi. After disabling secure boot and CSM enabled, I get to installation, but in the step to choose where to install i get no drive error message. Pls help.

Q572 Clean Install Win 8 Pro 64 bit. Hard disk formatted all partitions deleted by mistake, how to use Recovery DVD which came in box or re install Windows 8 Pro 64 bit?