Hacked Computer

I'm still seething with anger after the incident at Futureshop, where I had left my laptop to have it's hinges repaired. The techie had demanded the password to the operating system, yet I had refused to give it since I saw no reason why they would need it. I did get the computer back, but the password file had been deleted, so basically the user passwords had been reset; the bastards accessed my computer anyway. The guy is probably reading this post right now, I hope that my blog doesn't disappear mysteriously overnight...