I tried to install windows 10 on my hard drive ( i had to wipe everything ) .I used my dvd as normal , i got i could not load on that for one reason or another and left it . this morning i tried a usb to see if it would load , it started to install . The trouble is it has firefox as the option , how do i remove it and put install windows 10 back . The dvd did load once but it was MBR , i loaded windows on the drive tinking it would be GPT format . I thought once you change to gpt there was no going back , as my drive was . The drive is now gpt i changed it while installing thanks to someone on youtube .