I use AVG, Spyware Blaster, Malwarebytes.
I also use a free program to clean up the computer(e.g. Temp internet files, cookies. delete bin) it's called CCleaner.
Also cleans up the windows register.
It's blonde proof.
Four/five clicks and it's all done!!!
You can go into options/settings/secure deletion and change to secure deletion and set to 35 pass.
It's slower but a higher clean up.
I do not back changes in the register clean up and never had a computer fall over using it this way in over five years.
A hard drive defrag and you computer is running far better.