What is slowing my computer? Avast v Windows Defender

General Topics
1

My computer is running slow, intermittently. Could there possibly be a conflict between Avast and Windows Defender if running at same time? I have extremly low IQ when it comes to computers.
rascorp

2

You don’t need Defender. avast! already has you covered.

http://my.jetscreenshot.com/2701/m_20120823-szvx-18kb.jpg

3

I do not have a problem with Windows Defender on my Windows 7 system but I would not use Windows Defender on my XP Pro system.