Hi there,
theres a new thing going round called a Cd key stealer, Its pretty much a Backdoor Trojan that as soon as you execute the file it will going into your call of duty 4 file and Steal you CD key.
"Why the hell would I download a CD key Stealer then?" Well on they don't call it a CD key stealer they will change the name and configure it so you wont ven know it's one.
One way of doing this is selling it as a "Free Undetected Call of duty 4 hack" By this way as soon as you download it and click on the file, the file will steal your cd key.
No im not saying that all free hacks are a cd key stealer (Mombot actually make wonderful detected hacks) but just be aware there are people trying to take your cd key.
I.E The post "Free COD4Bot" By Pansemuckle is A CDkey stealer.
So before downloading free hacks do your homework find out what other people have said about it or usirus scanner.
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Note: youtube is crawling with cdkey stealers so just dont download anything from there.
hope this helps