Utilities Opinion...?

Hey folks,
I was just going down the list of utilities I have on my PC and I was wondering if this is just overkill.
Here are my programs installed...
Windows Defender
Iobit Smart Defrag
Advanced Windows Care V2 Pro
Avast Antivirus
CCleaner
a-squared free
Comodo Firewall
Prevx 2.0

Are there any on these I don't need? Or are there any "all in one" software that will do the job of most of these?
I could use some advice! Thanks!

 

You have good defence there.This is the question about how many memory you have on your comp,cos all in one can eat your memory and slow down your comp.I have 1 gb,so I don't have any slow downs.

If you want you can install internet security software (like mine-ZA Security Suite),and delete :Windows defender,Avast antivirus,a-squared free,Comodo Firewall.

Some one can say different thing,so I don't want to be the last person.Guys,say something.

 

Thanks Major,
I tried Zone Alarm awhile back and it really slowed down my computer. Avast is much better and automatic updates, which I prefer. Should I just get rid of Windows Defender and trust that Prevx will do the job?

 

Please,Can somebody enlight me,on how ZASS can slowdown comp,if you have 1gb mem?I use it for about 6 months,and realy I don't seeany slowdown on my comp,exept if you mean 2 minutes of start my comp(from pressing the power button,to till I can use app).Or maybe 80 mb of useing my mem?