ccsvchst.exe error at shutdown

Hi, I gave a try to NIS 2009. It's very fast, but every now and then when I shut down  my pc it hang up with the "ccsvchst.exe error" asking if I want to "end now."

I had already tried step 1 of this thread: http://community.norton.com/norton/board/message?board.id=Norton_360&message.id=2193#M2193, but it didn't work (my o.s. is XP sp3). Is it a problem of NIS 2009 or is there something wrong with my pc??

I  really wish to switch to NIS but this problem is very annoying.