How does UAC know what to block?

[vampist]

Easycleaner also cleans and alters the registry, so I wonder why UAC doesn't complain about that ?

Well, that is a tad weird. Does EasyCleaner at all before/after/during running the program ask for UAC?

Also Easycleaner might be running with higher permission levels that were set on install? Not sure.

Good Question.

It's not actually in the *header* of an .exe file, but it is in the .exe. Try opening a .exe file in notepad (if the licence allows this), and look for readable content. If it is not a legacy program, and it needs to elevate, you'll see it in there.

I would advise not doing this.. It will usually freeze up notepad if the .exe is anything large.
Also most .exe programs are also encrypted.. So it wouldn't even be readable.
Not to mention compiled.. so it would show a bunch of mumbo jumbo

 

[iPat]

You can always terminate notepad if it takes too long. You can also use a hex editor. And actually, most .exe's are not encrypted (and certainly not the manifest part.) .exe files contain quite a lot of human-readable information if you go through them patiently.

 

[vampist]

You can always terminate notepad if it takes too long. You can also use a hex editor. And actually, most .exe's are not encrypted (and certainly not the manifest part.) .exe files contain quite a lot of human-readable information if you go through them patiently.

Most important ones are.
Then why didn't you say hex editor