Firewall. You only need one, but it should be able to block both incoming and outgoing information. The Microsoft firewalls will only block incoming, as a result a third party firewall worthwhile click here.
Ccleaner. After installation leave settings as default and you should have no problems.
Being dim. We all have to learn, and the truly dim ones either ignore the advice given or are unwilling to solicit it in the first place as a result of arrogance.