Strategies For Replacing Program Executable in Windows

Question

I have a Windows program that needs to update itself from a server automatically.

It is already able to transfer files from the server and update + validate things l

Answer 1

1. Running exe downloads the new one, puts it somewhere
2. Running exe renames itself to anything (like .exe.tmp)
3. Running exe puts the downloaded exe where the running one is (named just like the original)
4. Running exe starts the downloaded exe
5. Downloaded exe checks for .exe.tmp file, if found deletes it and kills the old running process
6. Done