Hi expert,

My new laptop is Inspiron 15 Non-Touch - Inspiron 3531 with win8, and it seems everything is good, but I don't like win8, I just want to go back win7 or winxp. When I try to install the new OS, I got the same error message,like " STOP: 0x000000A5 ACPI error "

I upgraded the bios to the latest one under win8 already.

thank you