Will All These Firewalls And Anti Virus Stuff Messup My Pc?
I donloaded AVG today and all of that is running, all of norton is off so I got it.
I also have Windows firewall, and Windows defender turned on.
I can only have one of (?) or my comp will crash. So am I safe or what?

yes it safe. your pc defense is current good just up-to-date your anti-virus firewall, and defender..
i recommend you to try avast! for best protection
you should be fine, windows stuff normally integrates pretty well on a windows OS, so really AVG is the only thing to be concerned about, but its pretty a lightweight application anyway.
If you are having problems, maybe your computer is old, or maybe you do have a virus, or maybe you have other intensive applications running.
Virus scanners will slow down but Windows XP and Vista have good firewalls from them selves. You do not have use other firewall products except perhaps the one in your modem if there is any.
glad you got rid of norton
avg will do fine
avg will turn off what it does not want in the way but it’s safe so go for it
enjoy and happy surfing