CreateProcess error=740, The requested operation requires elevation

Question

I have a web applet that I update regularly and I finally decided to make an updater. However when I download an update in java it downloads fine. However when I try to unpack + run the update by using Runtime.getRuntime().exec(pathToFile); I get CreateProcess error=740, The requested operation requires elevation

How can I fix this if the program is a web applet? I can't just tell them to run their browsers as administrators. How can i fix this?

Answer 1

When using .exec(cmd), prefix your command with cmd /c so you end up with something like rt.exec("cmd /c <your command>"). This will launch the process and invoke the UAC if needed.