My 9-10 year old system had 16% space left until I dumped a bunch of audio and video files, plus tips I used from the Microsoft website to help clear a little more. Now I'm around a third of the space cleared. Yet my system still takes forever to boot up, and Firefox takes a long time too. I wondering if maybe I should uninstall Avast AV Free and Superantispyware since they may be taking up much resources. I was going to see if MSE and Spywareblaster were lighter on resources? I also have Private Firewall and Malwarebytes loaded on just to let you know. I've also done regular defrags as well as reboot defrag, but I'm not sure registry cleaning is the wisest move. Any thoughts? Thank you.