I have sony vaio svt14116pn. I installed latest intel RST driver. After installation it asked to restart the computer. After I restarted, system keeps crashing showing DRIVER_IRQL_NOT_LESS_OR_EQUAL. I am not able to enter recovery mode. When I try to boot through bootable windows 8.1 usb drive, same error appears. Please help!!
You may want to try the steps suggested in the links below.
http://windows.microsoft.com/en-us/windows-8/windows-startup-settings-including-safe-mode Windows Startup Settings (including safe mode) - Windows Help