[SOLVED] bought game on steam cant run it pls help

[toorup]

[SOLVED] bought game on steam cant run it pls help

i have vista 64bit i bought the game on steam and when i try to run it, it says game installation directory was not found. i dunno what to do

 

[Licaon_Kter]

the game is already downloaded?
try to run Steam as Admin

 

[toorup]

a reinstall fixed it