Need quick help

[ChinWooMan 34]

I'm going to restart my computer to play DayZ but I want to restart it later and play now.

I install the game from Steam yes.

So If I use my Arma 2 CO "CD Key" now.

Then I want to restart my computer.

Then when my computer is fully restarted I install Arma 2 CO from my steam account again which I already bought.

Does it let me use my CD key to play MP games?

Or I have to buy another Arma 2 CO?

Another question, does steam let me install the game to my computer if I restarted my computer and already bought the game earlier before I restarted and installed it. Or as again I need to buy a new set?

I will love if anyone answers to these 2 questions because I am very cautious with that I buy. And I am buying this game because of DayZ and Arma 2 is a great game as well.

[BlazeN'Chronic 51]

the CD key you purchased is locked to your account... any pc you log onto with your account you can DL the game, the CD key stays bound to your account.

[Zexis 127]

Uh, simple rebooting affects nothing.

[ChinWooMan 34]

Thanks for the replies!