Memory

How do I free up my memory. Right now my ram is sitting at around 55% used out of my 16gb. A while ago I bought a Alienware pc so it came preinstalled with all of the usual crap from a prebuilt pc. How do I go about freeing up my ram and killing programs that just take up space. I can do some stuff on my pc but I’m not super experienced. If possible I would like to avoid a complete reinstall of windows. Any help is much appreciated.

How do I free up my memory. Right now my ram is sitting at around 55% used out of my 16gb. A while ago I bought a Alienware pc so it came preinstalled with all of the usual crap from a prebuilt pc. How do I go about freeing up my ram and killing programs that just take up space. I can do some stuff on my pc but I’m not super experienced. If possible I would like to avoid a complete reinstall of windows. Any help is much appreciated.