Thanks for the welcome to the forum. Have a issue installing xp pro on a new Toshiba c855d-s5303 with Windows 8 preinstalled. finally got the xp disk to boot changing the boot mode from UEFI to CSM boot. Disk loads drivers and files and then freezes at starting windows then blue screen with stop error 0X0000007B. Then tried formatting entire drive and installing again with the same result. Toshiba cant tell me why. Can delete and install Windows 8 all day. What am I doing wrong. All Toshiba could come with was to get a new drive and try again.