We have had the free version for a month or so and decided to purchase the full version. Since then it just hasn't worked. Now the computer freezes up, spybot is "not responding" and when I can get it to start a scan it gets to 100% and keeps going for about 30 minutes and starts over automatically and then the numbers stop at 4.7% every time. I couldn't get it to run while the computer was in safe mode. If someone can offer some advice I'd really appreciate it. And also, the update service says stopped. What's going on?