I have never done this before but read several positive articles about hijackThis and I decided to give it a shot. Over the past several months my computer hasn't been able to run a full virus scan due to large outlook pst file and it always hangs. I am also noticing exceptionally slow boot times, program loads and occasionally iexplorer hangs up. Can you tell me if there are additional steps I can take to increase performance? I run defrag and cleanup once a week or bi weekly but it doesnt seem to help. Thank you for your help.