Closed [POSSIBLE fix] Increase your FPS

This link was tossed around a couple of times. I'm making an official thread about it.
http://www.edugeek.net/forums/gaming/39417-fix-steam-thinks-its-running-compatibility-mode.html
To fix the issue:
Hit start->run->regedit
Go to key: HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
Look for a entry with your path to steam.exe
Delete that entry
If you dont find it there try HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers

Hope this helps if you get the issue.

Now it did work for me.

 

I'm interested in this fix; I'm going to look into it.

However...
Anyone reading this that does NOT feel confident editing or deleting Windows registry key values should NOT attempt this fix!
Playing with registries and their values is a dangerous path. Deleting them is a whole different animal, especially if you don't know exactly what you're editing or why.

 

Nope, not in any of those locations.

 

I, like undefinedxx could not find it in any of the locations provided. Still lagging like crazy on an Alienware.