I got this pc about 4 years ago from a good friend whom I trust. I believe it had avast on it then, but I don't remember. Long story short, even with 512 mb of ram,I was still able to click on one my browser icons & it would launch within seconds. Then I started having problems with Avast & got rid of it & went to MSE. Eventually I got rid of it & am currently using Comodo AV & Firewall. Now after I reboot, it takes at least a minute or more to be able to browse & browsing is very sluggish at first but speeds back up as I surf. Yet, if I reboot & come back 10 to 15 minutes later, no problem browsing is great. I'm on DSL. Any help appreciated.