There are two files I've downloaded for work, both .ZIP, but if I try to extract them, I get "Windows cannot open the folder. The Compressed (zipped) Folder <filepath> is invalid," and if I try to open them with 7-zip, I get, "Can not open file <filepath> as archive."
Frustrating. Neither error has a number associated with it or anything like that.
#2
Shakey
Is it a password protected file?
#3
drifter
Maybe try ALZip? I didn't like the program for some reason, but I remember it did open up a file where 7zip failed.
You might also try The Unarchiver on Mac/Linux, though it might also be you're trying to open up a file that isn't really a .ZIP and just somehow got that extension left on it. Try opening it up with a text editor to see what's in it, the first line or so may give you some hints.