I've decided to attempt my first CS:S map, and I was compiling to test a small entity setup I had made, but after it was compiled (I have the game set to auto-run after compile), CS:S loads, but the map loads and returns me to the menu screen. I can load the map via the Create Server option or the console.
However, the problem arises when I exit CS:S and highlight Hammer. The computer lags like both processors are loaded to their capacity. Even Windows Media Player lags. The only way to stop it is to highlight an other window, and use the Task Manager to manually exit Hammer. This only happens with CS:S.
Any ideas?