Update for Windows Vista (Read original article below first.) Windows Vista does not have a boot.ini and uses a new form of boot loader. The official way to edit the boot settings is to use the included "bcdedit.exe" command line tool. However, using this tool is not easy and requires an advanced knowledge about using the Command Prompt. A wrong command could create serious problems and even render your computer unbootable. NeoSmart Technologies has a tool called EasyBCD which allows you to make changes to the boot loader of a Vista system, just as easily as you would edit boot.ini in an XP system. It provides a GUI front to the bcdedit.exe command line tool, making it very easy to enable or disable boot options. You can even install EasyBCD in Windows XP, if you have your system configured to dual-boot with Vista. To disable PAE on Windows Vista, download, install and run EasyBCD. In the 'Advanced Options' page of EasyBCD, Change "DEP/NoExecute" to