Malicious Attack

Pretty sure this came through iTunes. It disabled my internet for some time, after some work I was able to reconnect. Ran Norton Scan & Rootkit PE and got this error:

 

Norton Internet Security
21.5.0.19
Error: 3047, 40000
Windows 7 Home Premium
7601.18409.amd64fre.win7sp1_gdr.140303-2144
Norton Autofix Results: 0 item(s)

 

Any feedback is appreciated, thanks in advance.