Have you tried running it with administrator privileges?
Yes, I have.
But still no luck.
I noticed that in my web admin console I'm getting unexpected error message.
Message text is the following :
Unexpected HTTP response: 12152
"operation" => "read-children-names",
"child-type" => "subsystem",
"address" => 
Does anyone have any clue what this message means?
And you have no strange monitoring programs or virus scanners etc running?