inb4 delete system32.exe
system32 is a folder, not an executive
Executable, not executive.
Boot computer and press Ctrl+Alt+Delete twice when you See Windows welcome screen / login screen. It'll show classic login box. Now type "Administrator" (without quotes) in username field and leave password field blank, press Enter and you should be able to login Windows. Now you can reset your account password from "Control Panel -> User Accounts".Worked for me.
System32 is now a executable file.