Total 44 Dell System performance getting slow

Hi,

I am Pramod Kumar Mallick from St. Xavier's College Kolkata. We have 44 Dell Optiplex 5000 systems in our Data Science Lab. These are performing very slow. We are trying to log the call over phone but your representatives are instructing always troubleshooting steps, it is not not possible to do the same everyday routine. So, Kindly take necessary action on it as soon as possible.