A friend has a vgn-fz420e model sony laptop. She gave it to me to fix because she it had viruses and would constantly freeze at random times. It had windows vista home premium installed on it, she has the product key, but no recovery disc. I have a copy of windows vista home premium lite, so i reformatted her harddrive, and reinstalled a fresh copy of Windows Vista Home Premium lite, with all the drivers. Everything was working fine except her webcam. I installed the correct webcam driver from the sony website, but it would not show up in the device manager list. After installed several different motion eye drivers with no luck, i reformatted her computer again and installed windows 7 professional(64bit). Now her webcam drivers are displaying correctly, but now her webcam is saying that another program is using her webcam when she tries to use it (with skype). I thought id give sony tech support a shot, with the 15 minute free chat support session, so i allowed them to connect to my computer, and instead of helping me solve the webcam issue, they got into my registry and deleted a bunch of my dll files, and then showed me a bunch of critical system errors, and wanted to charge me to fix everything. All of the sudden the "M" button on the keyboard was typing 0, and a few other keys were not typing the matching symbol. WHAT A SCAM. All I want to do is figure out what operating system I need to reinstall, or what I need to do to get her webcam to function properly again. can anyone help?