FSX Windows 8 will not install. fix. go to the right side of your screen and go to your search menu. type "cmd". go to your apps. right click on your on the command prompt. run as administrator. at your main windows drive the command prompt should say "c:\windows\system32>. then type-net user administrator /active:yes . should look like this "c:\windows\system32>net user administrator /active:yes. this will enable the hidden administrator that is turned off by default. then run fsx and install. try this link if you need help. DO NOT OPEN REGEDIT AND CHANGE ANYTHING IN THERE. just install disk and run.