I've been holding out on upgrading to 8.1 since the last time I tried it, it messed up my screen resolution and sound quality even though all settings were the same. I reverted back to regular 8, but today my computer upgraded to 8.1 without any option to stop it. To my surprise, things didn't look low resolution like they did before...until I opened Steam (and other programs). Steam (and the other programs) looks like it's running at 1024x768 even though my resolution is 1920x1080. What is the freaking deal with 8.1? Jesus...I'm about ready to factory reset my computer AGAIN.
EDIT: I just updated my graphics driver and it didn't fix things. It just made Steam behave very strangely.