Team Fortress 2, Crash when Game start

Hey ho, ive downloaded Team Fortress 2 today, and patched it to version 1.0.7.3
But now it crashes alway when i try to join or start a server.
hl2.exe funktioniert nicht mehr / hl2.exe doesnt work no more
comes then and the game shutdown its the Steamless version of Team Fortress 2
Windows 7
X2 6000+
3GB DDR2
GTX 260OC
i hope you can help me,
sry for bad english
Answer #1
Exit out steam/hl2 and reopen steam and playing tf2!
Answer #2
> Hey There <
// Open Steam // // My games //
// Right click TF2 //
// Properties // // Start/Lauch Options //
And “Enter or Copy” what u Like,.
-noforcemaccel //Forces desktop mouse acceleration sets
-noforcemparms // Forces desktop mouse button config
-console // Opens automatic your Console when game Start!!
-novid // No intro movie, Faster Start up!!
-heapsize // Allocates your Ram for the Game, Below I Made for you a calculation !!
-high // Forces high CPU Priority
Ex // -noforcemaccel -noforcemparms -console -novid -heapzsize -high –refresh //
// Modify the heapsize command to allocate 50% more RAM of your PC //
// Formula how meany Heapsize u Got from you RAM //
RAM (in GB) x 1024 x 1024 / 2
Ex – 1GB = -heapsize 524288
Ex – 2GB = -heapsize 1048576
3,00GB x 1024 = 3.072 -> 3.072 x 1024 = 3145728 -> 3145728 / 2 = 1572864 -heapsize 1572864 ☻/ /▌
/ \ http://steamcommunity.com/id/Destroy079