1- Is acpi.sys is editable or non-editable? 2- If the acpi.sys is editable can I mod acpi.sys and install windows xp with USB. On CD it works very well with ACPI but now I broke my all CDs at home. 3- My PC has got CD ROM DRIVE but if there isn't any DVD ROM DRIVES how can I install XP? (I don't want to buy external dvd drive.) 4- Can IDA Freeware mod the ACPI.SYS to work with kaby lake? 5- I also have got Broadwell laptop but didn't install. 6- I don't want to brick my bios. How to install bios without bricking risk?