I purchased Windows 8 yesterday, backed up my stuff, and tried installing it. The installation screen was incredibly glitchy and unreadable but I put in my key and it continued. It gets to the end, still glitchy, and then my monitor goes into power saving mode and I can't bring it out. I restart and it says Windows 8 installation has failed and it's reverting back to my 7 installation. I use a Geforce GT 240 as my graphics card. If I run it with onboard graphics, the installation screen is nice and clear, and Windows 8 installs without a hitch. Once I switch back to my graphics card the problem(s) come back. The Upgrade Advisor said 8 supports my graphics card so I don't really get what the problem is since I can install Windows 7 fine and everything.
My other system specs are AMD Athlon X2 5000+, 4GB of RAM, 128GB SSD, 1TB backup drive, and a 450W power supply. If anyone could help me figure this out it would be much appreciated. If I forgot anything, just ask.