Windows 7 x64: Running Steam In Windows Compatability Mode Is Not Recommended

All of a sudden today, I booted my Windows 7 machine and got the following message when Steam tried to run:

So I checked the properties for Steam.exe and found that compatability mode was off:

Thankfully fixing this problem was quite straight-forward though:

  • Click Start, type regedit and then press the Enter key
  • In the left hand pane of Regedit navigate to the following key: HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
  • In the right hand pane delete the string for Steam.exe

Once I had done this I was able to start Steam normally.

According to Edugeek there is a second registry key that you can try if there is not a Steam.exe entry in the one listed above:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers

Thanks to Edugeek for the fix!