Ive used lots of software over the years that ,can alert you to new startup entries.Currently winpatrol and kerish doctor does this rather well.But Ive never found similar software that alerts when startup items are removed.I'm not sure why that is?.
Damn... Do you know ,I do have the plus version ,and have never noticed that.My eyes have always been drawn to the startup items list I have there , rather than that option. Thank you Han
Most good AVs do that, like Windows Defender or 360, they are doing it very nicely, even services or registry modifications.
user adwcleaner if you are not sure https://toolslib.net/downloads/viewdownload/1-adwcleaner/ or autoruns for manual check with virustotal https://technet.microsoft.com/sysinternals/bb963902 WP (pro) can prevent new entries and IMO will check them with a database (cloud). at least WP slows down and some users uninstalled it.