I am not sure if this has anything to do with it. But try changing the compatibility of Cheat Engine to windows xp, sp3. You can do that by right clicking on the icon and going to properties...that might work. Otherwise the file is messed up, which is why its not working for you, maybe because your computer isn't decompressing it right. Your best bet is to make a .CT file from scratch.
You can learn here:

Or you can learn here: