Quote Originally Posted by Cosme View Post
Hello, I have never used this software, but according to its description it has a real-time antivirus. You shouldn't use Norton and this one at the same time because both have real-time protection, it's very possible that this is causing the slowdowns.

Also their web page says that ad-aware pro is compatible with 64-bit vista:
@asrielrusdyawan What Cosme said is true. You should not use more than 1 realtime anti-virus products on your computer. That is what is causing the slow down