Speed Up My PC and Help Remove Bloatware with IT Skills

As the owner of a web development agency, I have more than 10 computers in my office.  I have DELL and HP computers as well as older PCs, and I need someone with expert (I am talking NINJA) skills who knows exactly how to tweak windows settings to gain the fastest speed possible.   Specifically, a snappy response to mouse movements. Right now, when I right-click, it takes about 30 seconds to execute the action.  Surely there is a way to restore the computer to the original state without factory resetting it if it wasn't like this when I bought it.  There is too much stuff on my computer that I don't want to factory reset.  The computer only needs to be used for browsing the web, and nothing else.  I need someone who knows how to turn off every other possible system process running without causing any problems. For example, there are 100's of processes running in the task manager, and 90% of them are not needed for simply browsing the web with chrome.  This position may open up into a full time IT job with my web agency.   I also have networking needs as well. For this job, you will need expert knowledge of all the Windows processes and the ability to describe them over screen sharing.  I'd like you to submit a quick loom video of your task manager, explaining what you're seeing, and giving me a sense of your understanding, and your accent. Thanks in advance for any tips you might offer on your initial video.