Another option is to simply remove the October update, but that presumes you're still able to boot into Windows without any issues. If so, head to Windows Update, select Update History, scroll to the ...
If your PC won't boot, all is not necessarily lost. You can save data from your storage drive via one of two methods.
Learn how to boot into Safe Mode on Windows 8 with our easy-to-follow guide. Safe Mode is a diagnostic startup mode that allows you to troubleshoot and fix various issues with your Windows 8 system.