I have got a new Lenovo y510p with 8.1, When I tried to install Ubuntu, It did not detect the USB. So I changed the boot mode to legacy and selected priority to legacy first. Before that I had also disabled the secure boot option.
Everything went well. But booting windows from grub wont' work and I had to change the boot every time whenever I want to use windows. So I installed boot repair and did recommended repair. It screwed everything and Ubuntu won't boot now.
So I decided to remove windows totally and start afresh
I installed Ubuntu removing windows completely creating some 10 partitions. Now When I try to install windows 8.1 it says
windows can't be installed in GPT style partition. Some forums suggested that it is due to booting in legacy mode. So I changed the boot mode to UEFI. After this The BIOS won't detect my hard disk or USB stick. But the BIOS information page shows the hard disk is present. But booting won't work. It's trying to boot from network.
Please help me