I feel my friend's wife installed a key logger when she had access to the computer before the split. She's taunting him with personal facts she should not know. I think Norton's Business products Ghost, Ghost Console and AV are the best. Are the commercial versions as potent? I need to help my friend. I plan to reformat the drive and reinstall windows. That surely will remove the keylogger software. I was just wondering if I I could buy Norton 360, install, run it and would it find any keylogger software? Then I could delete it. Restart windows, change the passwords again. Then restart again. Been awhile since I used a commercial AV, has Norton improved the performance speed while running AV? Thank you I look forward to your responses. Have a nice day.