Regardless there is no justification for ripping off other hard peoples work.
Your problem would probably lie in the fact that its a pirated copy pre patch and its full of bugs, errors and probably a few trojans to boot as well.
If it isnt out in the shops in Cyprus my best suggestion is to check Steam for your region by going to http://store.steampowered.com/
and downloading the client.
Otherwise i would get on eBay and get a copy off there for £10-15 and you will find it should run at a playable framerate.