Did an upgrade install of NOD32 v5 18.104.22.168 over version 4 on a Win7 x64 laptop. Ever since I have multiple lock ups of the laptop where I go to use it and all of the programs are unresponsive. The last time occurred tonight where all applications locked up 20 mins before I noticed it. NOD32 showed that it was trying to do an update and its progress bar was just sitting at 0. Trying to bring up taskmanager caused a window saying MS Windows has become unresponsive do you want to close this program. That caused all of the apps to disappear along with the desktop icons. I had to do a hard power off to get Windows restarted.