Okay,,, I hope you know why you want it...
Right click my computer > Properties > Hardware > Device Manager > expand Computer >right click ACPI > Properties > Driver > update driver > Install from a list or specific location > Don't search. I will choose the driver to install > Standard PC...
Next, next ok blah blah reboot...
Removing ACPI takes away a lot of functions,,, If your trying to straighten out an IRQ problem this won't do it... Basically there's not good reason I know to remove ACPI...