My computer is windows 7 . two days i was opened my system was totally blank display ... But I have windows 7 disc DVD when iwas inserted into DVD writer it was shows , after windows load, say that inserte DVD or USB or not found
Please test your Windows installation DVD on another PC. Does the installation start? Check the boot order in BIOS. Your DVD Rom should be in first place. If you have the option, try installing from an installation USB. The USBs usually show less installation errors.
If the installation does not start even on another PC, you may need to replace the DVD.