Ever since I installed Windows 8.1 preview, my Mobility Radeon HD 4550 has shown a "This device cannot start. (Code 10)" message in Device Manager. Much of the time my system works OK, getting by on the laptop's integrated Intel graphics chip, but every once in a while the system's performance dives through the floor; simple things like opening menus take 5-10 seconds. Rebooting the computer (which takes 15 minutes or so) will sometimes fix the problem, but there's no telling when the problem will trigger again. When this problem is not in play, the system works fine - I can do everything normally, and the system reboots in about a minute.
I've tried installing the Windows 8.1 Catalyst Preview Driver; it doesn't seem to make a difference, and my card still shows "The device cannot start" in Device Manager. This problem was not present with Windows 8; it appears to be specific to 8.1 Preview.
Graphics Card: Mobility Radeon HD 4550
AMD Catalyst Driver Version, and Driver History: 126.96.36.199, tried Windows 8.1 driver without success
Operating System: Windows 8.1 Pro Preview, 64-bit
Motherboard or System Make & Model: HP TouchSmart tm2t Notebook PC
Power Supply: unknown, built into laptop
Display Device(s) and Connection(s) Used: built-in laptop display
Applications and Games: nothing special. Issue seems to happen more often when I'm using Google Chrome, but that might be just because I use Chrome a lot
Intel(R)Core(TM)2 Duo SU9600 (1.60GHz, 800MHz FSB)
Motherboard BIOS Version: default
System Memory Type & Amount: 4GB DDR3 System Memory (2 Dimm), manufactured by HP