Val, a good dog is probably more value than any number of firearms or alarms. When you've raised them, and taught them, their basic instinct is to raise an alarm if there is an intruder, and to protect you.
In our house, my wife is the worrier. So, one year, I got her a nicle little DA 38 for Christmas. I told one of my friends at work, and he just looked at me, very disgusted, and said, "Never give a woman a firearm. Give them perfume, give them clothes, give them jewelry, but never give them a firearm." Then, he grinned, "You never know if you'll be the one they shoot."
No defense against intruders is perfect, and, past a certain point, you can spend a lot of effort without getting a lot of improvement.
Oh... get yourself Spybot Search and Destroy. It will take spyware off your computer. If you spend any time on the web, you have spyware on your computer. 99% of it is benign, just deciding which ad you are going to have popped up, but there is that malicious 1%.
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