I tried to upgrade my desktop to Windows 8.1. After installing I could never get through the setup without the system freezing up. I was able to run sfc /scannow and it said that files were corrupt. It claimed to have fixed the files, but it would freeze and crash again after rebooting. I was able to get some CBS logs which are attached. I even tried setting up though a Windows 8.1 download link that Microsoft support gave me. I reverted back to Windows 7 which works fine, but would still prefer to upgrade. Thanks for any help.