Portal wont run.

[Vannah]

Not even getting the launch window. But, I figured it out! I set hl2 to compatability mode for win xp sp3. Hope that helps. :)

[Benaj]

i reinstalled the game, it worked after that

[xWave24]

Verify your Portal data

[Leon senpai]

Desinstall an Re-install

[Fyre_X]

its your driver

[Vannah]

ok