If a Windows program with high power starts from a path without quotes, where would you put your own harmful program so the powerful one runs yours instead?

When a Windows program, especially one with high power such as a service, is configured to start from a file path containing spaces without enclosing the entire path in quotation marks, a vulnerability known as an "unquoted path" exists. Windows interprets an unquoted path containing spaces by progressively attempting to execute each segment of the path up to the first space, then up to the second space, and so on, until it finds an executable. For instance, if a program is set to run from `C:\Program Files\My Application\PowerfulProgram.exe` without quotes, Windows will first attempt to execute `C:\Program.exe`. If that file does not exist, it will then try to execute `C:\Program Files\My.exe`. If that also does not exist, it will finally attempt to execute the legitimate program at `C:\Program Files\My Application\PowerfulProgram.exe`. To insert your own harmful program into this execution sequence, you would place your malicious executable, named appropriately, into the earliest directory in this search path where you have write permissions. Continuing the example, the most effective location would be the `C:\` root directory, and your harmful program would be named `Program.exe`. When the legitimate powerful program attempts to start, Windows will discover and execute your `Program.exe` in the `C:\` directory before it reaches the intended `PowerfulProgram.exe`. Your harmful program would then inherit and run with the same high power, or elevated privileges, as the legitimate program it was meant to replace, allowing it to perform actions requiring those permissions.