Hi there along with your (free) AntiVirus AVG or whatever
you might like to download the following utility,I use it all
the time -Advanced SystemCare Free v3
from here
http://www.iobit.com/, while there take a look
at other free downloads.Also if I can make a suggestion
to Google "ways to speed up your computer",substitute
computer with what ever application you are running.
Only have one AV program installed and running as
running more than one can cause problems. With Windows
Defender (firewall),AVG and advanced system care installed
you should be fine. With ASC3 there's a little program called
SmartRam which your RAM as free as possible.
Cheers