I can clearly see your frustrated, lets see if we can fix your problem.
When did this problem first occur, was it out of the blue? or did you make a change on your system?
I agree that it is some sort of security problem, which anti virus software do you use and firewall?
If you can tell me this it might give some direction as to where to go from here.
You can also try to disable your anti-virus and firewall see if it makes any difference
On your computer go to http://www,ccleaner.com and download the program, its freeware and will fix any damage to your registry itll also clean up unwanted files.
Do you have a firewall installed also?
Let me know