You certainly could use more RAM. But one thing I see or actually More than one thing I see running are these programs:
Advanced WindowsCare V2 Personal
Advanced SystemCare Free v3
SmartRAM which is also part of the above programs.
Turn these off. All three of them.
Here is the advice I find concerning all three of these from
HERE:
This program is not required to start automatically as you can run it when you need to. It is advised that you disable this program so that it does not take up necessary resources.
There is absolutely no reason why this program should run all the time. If constant changes are being made to the registry then, at least in my opinion, this could cause problems. Turn these three programs completely off and see if this make a difference.
Also, please remove the OLD version of HiJackThis from your computer and use the new version.