Help my computer is running slow

[MessieJessie]

I'm not sure what is wrong with my computer. It freezes up alot and also I tried to remove Norton Antivirus because it was out of date and said I needed to download a new version that was expensive so I downloaded AVG anti-spyware and now I cannot remove Norton.

Thanks!

 

[kimsland]

Norton complete removal instructions: https://www.techspot.com/vb/topic100496.html#2