And the fix is... Linux! Before you mod me funny, hear me out.
Pick a good Linux distro and install it dual-boot alongside whatever version of Windows you're running. In the installation of most distros you can add a separate partition; do so.
Alternately, you can run FDisk (which will wipe out all data) and make three partitions. Install your current version of Windows in one of them, then W8 on a second, and then install Linux on the third.
When you boot your machine you'll get a menu giving you a choice of (e.g.) Win 7, Win 8, and Linux. Use Win 7 or Linux for normal computing and Win 8 for the W8-only games.