sysWOW64 Files using all of my memory

Sometimes a variety of applications in the sysWOW64 folder will randomly start up and use up all of my computer's memory. Some examples are rundll32.exe, regsvr32.exe, and svchost.exe*32. Virus scans come up with nothing and I have seen similar posts on this site so hopefully you can help. I have attached the FRST and Addition files.

Thank you in advance.