Ok, I have an Acer Aspire ES1-511 that came with Windows 8.1 installed. I've read what seems like every solution to getting 8.1 off but it's not working for me. In my BIOS, much of the boot options are grayed out, except the option to switch to Legacy. When I do that and it boots up, all I get is the black screen with the message about there not being a bootable disk (something to that effect). When trying to install 7, it goes until the installation requires a reboot, in which after that, I get a black screen with 2 boot options: Setup and Windows 8.1. It won't let me choose Setup and tells me I need to disable the signature enforcement. I tried that, but it's only a temp fix and doesn't carry over into the next restart. So my only option is to boot into 8.1, which leaves me at square 1. So can someone please help me get 7 installed? This is absolutely the last time I'm buying a Windows computer and I only bought it for work purposes. It's been nothing but a pain. Thanks in advance!