Hi everyone,
I had windows 10 installed on my Dell Inspiron 7720 laptop for around a year. I wanted to roll back to windows 8.1, so i downloaded the usb media from microsoft website.I booted from the pen drive and formatted all the drives. After that I proceeded to install windows 8.1. When the setup had just started copying files, my laptop shut down due to low battery. Now when i am trying to boot from usb or dvd, i am getting an error saying "An operating system was not found. Try disconnecting any drives that don't contain an operating system. Press Ctrl+Alt+Del to resart".
Also, when I am trying to change the boot order or to load default settings in bios, I am getting an error - "FORMSET 98FBBCFB-1392-4FDE-ABB8-C41CC5AD7D6D
Failed to save storage: Boot_mem-Boot_ITEMS. Status Access Denied"
Someone suggested me to reset the bios by reseating the CMOS Battery. Did that but still getting same error. I have run out of idea now, and desperately need help. If someone has any suggestion, please help me out.
Thanks,
Ravi Kaurav