Computer Running Extremely Slow After Windows Defender Download?

Dec 30, 2015

Windows 10 Home (1511)
64-BitOS
 
I've had Windows for a few months now and never really had an issue until the past few days. Overall CPU performance/speed is way down. Firefox freezes then recoops every 2-3 minutes, adobe plugin constantly crashing, even to do things offline is crazy slow.
 
I downloaded Windows Defender probably a week or 2 ago and that is the only big change that I know of done on this computer. I used to run Malewarebytes, SuperAnti-Spyware and Advanced Windows SystemCare. But was told that Advanced Windows SystemCare was the devil and to try TFC (temp file cleaner) & MyDefrag instead. So now i'm running;
 
Windows Defender
MalewareBytes (free)
SuperAnti-Spyware(free)
TFC
MyDefrag
 
Is this combination making my computer un usable? Or something else?

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