When your PCs slow down, there are lots of explanation that might cause the problems. It could be your hard drive in your PC has too many files and not organized well. However, there are also another factors that might cause your PC to slow down. It might already turned into zombies that is it is now are stealthily doing multi-tasking jobs which commanded by its “new master”. This command may also include sending thousands of spam emails or copying each keystroke that you entered into your PC (including your …