Hi I bought lenovo G50 laptop and installed windows 7 but now i want to install windows 8.
The issue is when i insert win8 disc and boot i see an error ACPI_BOOT_ERROR blue screen with a smile.

1) I tried changing Exit > Other OS to Exit > Win 8 (64 bit) (fail)
2) Boot > Legacy Support to UTFI
3) ACPI i4 to i5

But not any process fixed the issue.
Pls give me your best advices if this issue can be fixed.