You didn't mention what you get with "adb devices" so I'll presume that you tried it, but it didn't print anything?
18d1/4ee2 is MTP/ADB. It shows up because the MTP driver is easy to find, but I'll bet that you never installed a driver for ADB. See that folder labelled "adb driver"? Have you used it?
Go to Device Manager. Look for your ADB interface. It might be under "USB devices" or "USB controller" or "Portable devices" or even "Android". It might have an ! mark or it might not. Go to reinstall driver and
manually select that "adb driver" folder.
Then do "adb devices".