Norton 2012 and his security during startup

Since Norton 2012 this day, I notice during starting up Windows 7 Ultimate 64 bits, it takes way more longer all the icons are loaded, on the right bottom corner. I also hear since this day; Windows is sounding off a sound. This sound belongs to: "Device can't make connection." I went to Control Panel -> sounds and checked, where the sound stands for.

 

I hear this sound 3 times on short moments.

 

Asus P6T Deluxe V2

Core i7 920 @ 2.67 and in hyperthreading

Windows 7 64bits Ultimate

AMD 5970 videocard

6GB 1066Mhz tripple-channel

OCZ Vertex (1) 60GB latest firmware 1.7