Sometimes my PC just runs slow. Four out of five days / week, it's just fine.
Then all of a sudden it is sluggish all day long and fine the next day.
Doesn't seem to have anything to do w/antivirus running cause it's not. I've
installed Windows Defender and it says PC is running OK. AVG does not detect
any viruses.

Is there any diagnostic software that I can use to just run PC check to
determine what is going on? Thanks in advance.

KenP