Product key! :(

[Guest]

y is the product key say invalid when i know its the correct one!!!!!! help someone

 

[number13]

contact the tech support

 

[mi1ez]

where did you get the key?
what software?
have you tried re-entering it?

 

[jaguarskx]

Did you buy a used game?

 

[isamuelson]

One more question in addition to the others:

What game is it?