HELP PLEASE steam compatibility

so i have steam and i don't know what happened i might have accidentally done something but now it says steam should not be running in compatibility mode and go to properties to change it but I've unchecked everything and it still says im running steam in compatibility. one of my games(civ v) doesnt work becuase it says i need a service pack 2 or higher and i just want it to go back to normal. any help here?

1. Go to Start > Run > Regedit
2. Find key HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
3. Within the key, find the entry that has the path to steam.exe
4. Delete that entry and that entry alone
5. If you can't find the entry, look for it under HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
6. You may need to reboot for the change to take effect

Im having the same problem, but I dont have this folder (AppCompatFlags) in my regedit, what do you suggest?