Steam not working due to Windows compatibility mode

[Revolt]

When I try to start it up I get the message:

Running Steam in Windows compatibility mode is not recommended.
Please remove any Windows compatibility settings for all users
under file properties for Steam.exe and restart Steam.

What can I do to fix this? By the way I use Windows 7 64 bit if that helps.

 

[Revolt]

how do I turn off compatability mode, I can't find it.

 

[Revolt]

I just did that and I'm getting the same message. Do I have to restart steam cos I restarted the computer but I don't know how to restart steam.