Speak for yourself. I run both Windows 8 and Windows 7 machines, and my Windows 7 machines are demonstrably more stable and less buggy than my Windows 8 one. (Note: I say one because I've had such a piss-poor experience with Windows 8, which rapidly degrades in performance to the point of near-unusability. And even straight out of the box with a fresh install, it likes to do things such as take multiple *minutes* before task manager appears on a core i5 machine with 8GB of RAM and 50% CPU utilization or less. There's no way I'm buying another machine with Windows 8, let alone installing it on one. If I could downgrade to Win7 without needing to pay for an OS when I already paid for Win8, I'd do it in a heartbeat. And no, Linux is not an option for people who need to use real software.) Windows 8 is a total dog, and has been from the day it shipped, even before one takes into account the absolutely godawful UI.
Something is horribly wrong with your install. You either A) have a hardware fault somewhere on the workstation, B) have installed some kind of horrifically incompatible driver/software (windows XP-era, is that you?) or C) have managed to get a root kit/malware/adware/virus/trojan on your workstation. I have a ton of windows 8 machines in my house, everything from a surface pro to a hand built desktop to a gaming laptop and they are fast and have no visible glitches. all of my roommates are on 8 as well with no issues.